General vs sheepdog

General

noun

  • The military officer title 

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. 

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