Hadean vs demoniac

Hadean

adj
  • Pertaining to Hades or hell. 

  • Of, or relating to the geological eon. 

name
  • The Hadean eon; part of the Precambrian supereon, spanning from around 4.6 to 4 billion years ago. 

demoniac

adj
  • Of or pertaining to demons; demonic. 

  • Possessed or controlled by a demon. 

noun
  • Someone who is possessed by a demon. 

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