bobby vs prisoner

bobby

noun
  • A banana that is extra small in size. 

  • A penis. 

  • A police officer. 

  • 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. 

prisoner

noun
  • Any person held against their will. 

  • A person who is or feels confined or trapped by a situation or a set of circumstances. 

  • A person incarcerated in a prison, while on trial or serving a sentence. 

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