cynanthropy vs zoanthropy

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. 

zoanthropy

noun
  • A kind of delusion in which the patient believes himself transformed into one of the lower animals. 

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