madness vs schizophrenia

madness

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

  • rash folly 

  • The state of being angry. 

schizophrenia

noun
  • A psychiatric diagnosis denoting a persistent, often chronic, mental illness characterised by abnormal perception, thinking, behavior and emotion, often marked by delusions. 

  • Any condition in which disparate or mutually exclusive activities coexist; a lack of decision between options. 

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