criminal vs police officer

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. 

police officer

noun
  • A peace officer who is a member of a police force. 

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