omnivore vs zoophage

omnivore

noun
  • An animal which is able to consume both plants (like a herbivore) and meat (like a carnivore). 

zoophage

noun
  • An organism that consumes animal matter, or a species whose members do so; a carnivore 

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