cynanthropy vs werewolfism

cynanthropy

noun
  • A delusion in which a person believes he or she is transformed into a dog. 

  • A shape-shifting ability between human and canine forms. 

werewolfism

noun
  • lycanthropy; the transformation of a person into a wolf 

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