palingenesis vs rebirthing

palingenesis

noun
  • Rebirth; regeneration; (countable) an instance of this. 

  • Spiritual rebirth through the transmigration of the soul. 

  • The recurrence of historical events in the same order in an infinite series of cycles. 

  • The regeneration of magma by the melting of metamorphic rocks. 

rebirthing

noun
  • Rebirth. 

  • The practice of transferring identifying parts of a wrecked car (registration plates, compliance plate, etc.) onto a stolen car of the same make and model, allowing the stolen car to be sold with the identity of the wreck. 

  • The role-playing practice of bodily crawling into and reemerging from a simulated vagina. 

  • An act of resetting a player character's level to its initial value (i.e., 1) while retaining equipment and/or some skills (a feature that allows a player to try out different classes or builds). 

  • The practice of simulating the birth process by wrapping a child tightly in blankets from which it must struggle to escape, as an intended treatment for attachment disorder. 

How often have the words palingenesis and rebirthing occurred in a corpus of books? (source: Google Ngram Viewer )