futility vs madness

futility

noun
  • Something, especially an act, that is futile. 

  • Unimportance. 

  • The quality of being futile or useless. 

madness

noun
  • rash folly 

  • The state of being mad; insanity; mental disease. 

  • The state of being angry. 

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