Bozo vs Tonto

Bozo

name
  • The Mande language of these people. 

noun
  • A member of a West African ethnic group located predominantly along the Niger River in Mali, famous for their fishing. 

Tonto

name
  • The Native American sidekick of the Lone Ranger. 

  • A member of the Tonto Apaches. 

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

  • A sidekick. 

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