hydrophobia vs madness

hydrophobia

noun
  • A morbid fear of water; aquaphobia. 

  • An aversion to water, as a symptom of rabies; the disease of rabies itself. 

madness

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

  • rash folly 

  • The state of being angry. 

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