aevum vs hereafter

aevum

noun
  • The temporal mode of existence between time and eternity, said to be experienced by angels, saints, and celestial bodies (which medieval astronomy believed to be unchanging. 

hereafter

noun
  • Existence after death. 

  • A future existence or state. 

adv
  • Sequentially after this point (in time, in the writing constituting a document, in the movement along a path, etc.) 

  • From now on. 

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