felon vs gangster

felon

noun
  • A person who has committed a felony. 

  • A wicked person. 

  • A bacterial infection at the end of a finger or toe. 

  • A person who has been tried and convicted of a felony. 

adj
  • wicked; cruel 

gangster

noun
  • A member of a criminal or street gang. 

  • A member of a professional criminal organization; a racketeer. 

verb
  • To act like a gangster; to commit street crime or run a racket. 

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