mammal vs mammalian

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. 

mammalian

noun
  • Any mammal. 

adj
  • like a mammal 

  • of, or pertaining to, mammals 

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