grazier vs plower

grazier

noun
  • One who grazes cattle and/or sheep on a rural property. 

  • The owner of a large property on which sheep or cattle graze. 

plower

noun
  • One who plows; one who works land with a plow. 

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