cynanthropy vs derangement

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. 

derangement

noun
  • An act or instance of deranging. 

  • A permutation of a set such that no element is in its previous position. 

  • The property of being deranged. 

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