cannibal vs omnivorous

cannibal

noun
  • An organism which eats others of its own species or kind, especially a human who eats human flesh. 

omnivorous

adj
  • Having a diet which is neither exclusively carnivorous nor exclusively herbivorous. 

  • All-consuming. 

  • Having an interest in a variety of subjects. 

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