Yardie vs racketeer

Yardie

noun
  • A member of an Afro-Caribbean gang who engages in organized crime, especially drug trafficking. 

  • A Jamaican. 

racketeer

noun
  • one who instigates or has involvement with a racket. 

  • one who commits crimes (especially fraud, bribery, loansharking, extortion etc.) to aid in running a shady or illegal business. 

verb
  • to commit crimes systematically as part of a criminal organization. 

  • to carry out illegal business activities or criminal schemes. 

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