I don't think there is time in Spirit at all. None what so ever, I believe time is a measurement constructed and a concept developed by humans alone.

This is why some get a visit immediately and others have to wait years .

There is for me no evidence to suggest the existence of time in Spirit. at the very least No time in anything like we understand time.

Some mediums have suggested to me that miscarried babies and those who die very early in life continue to grow to adult hood in Spirit, yet conversely , mature individuals don't seem to continue to age in spirit, so that might be a bit of perception going on.

Anyway, It was a really good question, thank you for asking it.