hound vs sheepdog

hound

noun
  • Any canine animal. 

  • A dog, particularly a breed with a good sense of smell developed for hunting other animals. 

  • Someone who seeks something. 

  • A houndfish. 

  • A despicable person. 

  • A side bar used to strengthen portions of the running gear of a vehicle. 

  • Projections at the masthead or foremast, serving as a support for the trestletrees and top to rest on; foretop 

  • A male who constantly seeks the company of desirable women. 

verb
  • To persistently harass. 

  • To urge on against; to set (dogs) upon in hunting. 

sheepdog

noun
  • A breed of dog, used for herding sheep. 

  • A breed of dog used for guarding sheep. 

  • A police officer. 

verb
  • To chaperon or shepherd. 

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