tormentor vs tough cookie

tormentor

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

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

  • Something abstract 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. 

tough cookie

noun
  • A person who can endure physical or mental hardship; a hardened, strong-willed person. 

  • A hardy, resilient animal or plant. 

  • Something troublesome or difficult to handle. 

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