insane vs psycho

insane

adj
  • Causing insanity or madness. 

  • Used by or relating to insane people. 

  • Extremely good; incredibly amazing. 

  • Characterized by insanity or the utmost folly; ridiculous; impractical. 

  • Exhibiting unsoundness or disorder of mind; not sane; utterly mad. 

psycho

adj
  • Psychotic or otherwise insane. 

noun
  • A person who acts in a bizarre or dangerous manner. 

  • A class, at a college or university, in which psychology is taught. 

  • A person who is psychotic or otherwise insane. 

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