Having been asked the questions numerous times, I have two theories on what the time span is between lives. One from my Spiritualist Theology and one gathered from years of working with spirit. Here they are respectively.

If spirit are considering reincarnation, most will do so approximately 40-60 years after their previous incarnation. Remember, there is no time on the other side, so 40-60 years in our time is but a blip on their radar. Spirit go through much while in-between lives. Here’s but a few…

Past Life review
They learn what their roles were while in the most recent incarnation.
Where could they have benefitted others?
They also use this time to help others on Earth
Determines what future lessons they need to learn
Then, there’s my theory…

The earliest spirit has shown or mentioned to me that reincarnation occurs is as early as 8 years. In my opinion (because of the nature of their passing) this is much too soon. Here’s why…

Have they learned why they passed, i.e. physical death, mental death, suicide?

Have they taken the time to learn everything they need to regarding the cause of their death before reincarnating?
What is their purpose for reincarnating this early? Are they trying to fix something from a past life?
If they reincarnate this early do they really have the knowledge needed to successfully complete their goals, or are they just trying to jump back in to reach spiritual enlightenment sooner?

Given both of these situations, and from my own personal opinion, it would seem that the average time span between the death of the physical body and reincarnation would be between 20-60 years. This is not to say that less than 20 years wouldn’t be unheard of, nor would hundreds of years between incarnations. However, it all depends on their soul’s journey. What they were created by God to do. There is no right or wrong, it simple depends upon the souls intentions.

Author's Bio: 

Experiencing paranormal and spiritual phenomenon for more than five decades, Lisa began seeing spirit at the young age of four years. Around the age of six Lisa knew there was more to this world than what we see in the here and now. Information was imparted to Lisa about living multiple lifetimes and thus began her deeper understanding of the spiritual realm, reincarnation, and the possibility of communication with those in-between lives.

Today, Lisa’s communication with departed loved ones and ancestors have touched thousands of people worldwide. Lisa is a Survival Evidence Medium, meaning she is able to bridge the gap between that of the living and the dead by providing evidential proof of life after death via detailed messages and proven facts.

Lisa has written countless articles, which have been featured on websites, in print magazines, and her own personal blog. Her first book, The Lessons Of Jesus Christ, was published in 2013. Her book, The Visible Energy Around Us: A 4 Week Guide To Reading the Aura is a self-study class you can take at your own pace. Two more books are in the works; From His Lips: 365 Daily Devotions From Jesus Christ and Tracking; Following Your Loved One’s Passage To Heaven . She has made appearances on television and radio and co-hosted on CBS and Blog Talk Radio. Lisa teaches spiritual development classes and holds public Spirit Galleries nationwide.

Lisa has presented at a multitude of Spiritual, Metaphysical and Consciousness events. Her sense of humor as well as her vast knowledge of the subject matter make her an internationally sought after speaker, presenter and instructor.

Body-Mind-Spirit-Festival: Lisa was a reader, vendor, presenter and performed Demonstrations of Mediumship.
Your Spiritness Expo: Lisa served as a reader, vendor and performed public Demonstrations of Mediumship.
The Awake & Empowered Expo: Lisa sat on the Spiritual Development and Consciousness Panels, did a performed a Demonstration of Mediumship, and presented The Cycle of the Soul.
The Afterlife Awareness Expo: Lisa is a vendor and does private readings.
CBS Radio: Radio host
The Woman’s Everywhere Expo: Lisa is a vendor and does public Demonstrations of Mediumship and presents on a multitude of spiritual topics.
Blog Talk Radio: Radio Host
The Body, Mind, Spirit Expo: Lisa is a vendor and does public Demonstrations of Mediumship and presents spiritual topics.
The World Of One Expo: Lisa is a vendor, will do select readings, and performs public Demonstrations of Mediumship.
Healing Body & Spirit Expo Psychic Fair: Lisa will be a speaker presenting upon her book Tracking, doing select readings, Demonstrations of Medium, and have a vendor booth.
Intuitives Interactive Expo: Lisa will be speaking upon the Ethic and Professionalism of Psychics and Mediums.
Lily Dale Assembly: Spiritual Development Instructor

Lisa is continuously updating her skills in the fields of Mediumship, Spiritual and Personal Development, Metaphysics, and Parapsychic Science. She is a certified Spiritualist Healer, Reiki Master, Certified Spiritualist Medium, Certified Psychic Medium, Ordained Spiritualist Minister, Ordained Metaphysical Minister, and currently holds a Bachelor’s degree in Metaphysical Sciences from The University of Sedona.