aeon vs meantime

aeon

noun
  • A spirit being emanating from the Godhead. 

  • Each universe in a series of universes, according to conformal cyclic cosmology. 

meantime

noun
  • The time spent waiting for another event; time in between. 

adv
  • during the interval; meanwhile 

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