madness vs rationality

madness

noun
  • rash folly 

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

  • The state of being angry. 

rationality

noun
  • The quality or state of being rational; due exercise of reason; reasonableness. 

  • Objective consideration. 

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