retriever vs sighthound

retriever

noun
  • A type of gun dog that retrieves game for a hunter. 

  • A tool for retrieving materials from the body after an operation. 

  • One who retrieves something. 

sighthound

noun
  • A hound that primarily hunts by sight and speed, instead of by scent and endurance. 

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