Tonto vs impressionable

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. 

impressionable

noun
  • An impressionable person. 

adj
  • Being easily influenced (especially of young people). 

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