Yahoo vs boot boy

Yahoo

noun
  • One of a race of brutes, who look and act similar to men, inhabiting the same land as the civilized Houyhnhnms. 

  • An employee of the Internet company Yahoo!. 

boot boy

noun
  • A boy who cleans boots and shoes. 

  • A boy who cares for a footballer's boots. 

  • One of a gang of violent hooligans who usually wear short-cropped hair and bovver boots. 

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