Tonto vs bitzer

Tonto

noun

  • A Native American who accepts a subservient position to a white person. 

  • A sidekick. 

name

  • A member of the Tonto Apaches. 

  • The Native American sidekick of the Lone Ranger. 

bitzer

noun

  • A mongrel dog. 

  • A person of mixed race or ethnicity. 

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