How many levels of enlightenment are there? I have experienced enlightenment multiple times.

I have found many religions have a similar way of describing it, though they can differ about how many experiences occur and if they are sudden or spread apart over long periods of time. 

I have also heard it referred to as
 Kundalini Awakening where it is a process that can take years to go through the 7 stages.

According to this article there are Four stages of enlightenment


  My question is this, How many levels or layers of enlightenment are there? Does it happen all at once?
How many levels of enlightenment are there?

I think it depends on the school, which defines and describes enlightenment.


You mentioned that Theravada defines four stages.
Wikipedia says that Mahayana defines Five Paths and Ten Bhumis.
"Kundalini awakening " is (I think) generally seen as Hinduism rather than Buddhism.