metis vs mutt

metis

noun
  • A person of mixed-race ancestry. 

  • A person of one-eighth black ancestry; an octoroon. 

  • Practical intelligence; street smarts. 

adj
  • Of mixed heritage 

  • Of Métis heritage. 

mutt

noun
  • A person of mixed racial or ethnic ancestry. 

  • A mongrel dog (or sometimes cat); an animal of mixed breed or uncertain origin. 

  • An idiot, a stupid person. 

  • A person from the United States, in reference to sense 2. 

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