pastor vs sheepherder

pastor

noun
  • A minister or priest in a church. 

  • Someone with spiritual authority over a group of people 

  • A bird, the rosy starling. 

  • The main priest serving a parish. 

verb
  • To serve a congregation as pastor 

sheepherder

noun
  • A person who herds sheep; a shepherd. 

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