Yank vs jock

Yank

noun
  • An American: someone from the United States. 

  • A Yankee, a Northerner: someone from the Northern United States, especially from New England. 

jock

noun
  • A jockey. 

  • An enthusiastic athlete or sports fan, especially one with few other interests, often stereotyped as slow-witted person of large size and great physical strength. 

  • A Scotsman. 

  • Food; meals. 

  • A disc jockey. 

  • A young male athlete (through college age). 

  • An athletic supporter worn by men to support the genitals especially during sports. 

verb
  • To humiliate. 

  • To steal. 

  • To masturbate. 

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