indigestible vs tormentor

indigestible

noun
  • Anything that is difficult to digest. 

adj
  • Difficult or impossible to digest. 

  • Difficult to accept; unpalatable. 

tormentor

noun
  • Something abstract that causes suffering. 

  • An implement for reducing a stiff soil, resembling a harrow, but running upon wheels. 

  • One who torments; a person, animal, or object that causes suffering. 

  • One of a pair of narrow curtains just behind the front curtain and teaser that mask the areas on the sides of the stage and can be adjusted to the desired width. 

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