bobby vs peacekeeper

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. 

peacekeeper

noun
  • An officer of the peace (police officer) in a force run by a Canadian aboriginal community. 

  • One that preserves the peace. 

  • A member of a military force charged with peacekeeping duties in a troublespot. 

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