sheepdog vs superintendent

sheepdog

noun
  • A police officer. 

  • A breed of dog, used for herding sheep. 

  • A breed of dog used for guarding sheep. 

verb
  • To chaperon or shepherd. 

superintendent

noun
  • A police rank used in Commonwealth countries, ranking above chief inspector, and below chief superintendent. 

  • A janitor. 

  • The head of a Sunday school. 

  • The manager of a building, usually a communal residence, who is responsible for keeping the facilities functional and often collecting rent or similar payments, either as also the building's landlord or on behalf of same. Often abbreviated "super". 

  • In some Protestant churches, a clergyman having the oversight of the clergy of a district. 

  • A person who is authorized to supervise, direct or administer something. 

adj
  • Overseeing; superintending. 

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