bobby vs law enforcement

bobby

noun
  • A police officer. 

  • A banana that is extra small in size. 

  • A penis. 

  • A railway signaller. 

  • A calf that is slaughtered in its first month, usually because it has no mother or because it is undersized or otherwise defective. 

  • Cocaine. 

law enforcement

noun
  • The various government agencies, regarded collectively, involved in the prevention of crime and the apprehension of criminals. 

  • The task of ensuring obedience to the law. 

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