heavens vs underworld

heavens

noun
  • The distant sky of the sun, moon, and stars. 

intj
  • An expression of surprise, contempt, outrage, disgust, boredom, or frustration. 

underworld

noun
  • The world of the dead, located underneath the world of the living; the afterlife. 

  • That part of society that is engaged in crime or vice. 

  • The portion of a game that is set below ground. 

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