criminal vs gangster

criminal

noun
  • A person who is guilty of a crime, notably breaking the law. 

adj
  • Against the law; forbidden by law. 

  • Guilty of breaking the law. 

  • Abhorrent or very undesirable. 

  • Of or relating to crime or penal law. 

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 criminal and gangster occurred in a corpus of books? (source: Google Ngram Viewer )