Plover vs Tonto

Plover

name
  • A village in Portage County, Wisconsin, United States. 

Tonto

name
  • A member of the Tonto Apaches. 

  • The Native American sidekick of the Lone Ranger. 

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

  • A sidekick. 

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