intelligibility vs madness

intelligibility

noun
  • The quality of recorded speech of every word being understandable. 

  • That which is intelligible; the degree to which something is intelligible. 

madness

noun
  • rash folly 

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

  • The state of being angry. 

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