mammal vs swine

mammal

noun
  • An animal of the class Mammalia, characterized by being warm-blooded, having hair and producing milk with which to feed its young. 

  • A vertebrate with three bones in the inner ear and one in the jaw. 

swine

noun
  • A pig (the animal). 

  • A contemptible person (plural swines). 

  • A police officer; a "pig". 

  • Something difficult or awkward; a pain. 

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