colossus vs mammal

colossus

noun
  • Any creature or thing of gigantic size. 

  • Somebody or something very greatly admired and respected. 

  • A statue of gigantic size. The name was especially applied to certain famous statues in antiquity, as the Colossus of Nero in Rome and the Colossus of Rhodes, one of the Seven Wonders of the Ancient World. 

mammal

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

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

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