hydrophobia vs insaneness

hydrophobia

noun
  • A morbid fear of water; aquaphobia. 

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

insaneness

noun
  • insanity; madness 

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