Dally vs mutt

Dally

noun
  • A New Zealand person of Croatian or other Balkan descent. 

name
  • A surname. 

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 Dally and mutt occurred in a corpus of books? (source: Google Ngram Viewer )