farm worker vs grazier

farm worker

noun
  • A person who works on, but does not own, a farm; an agricultural labourer. 

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. 

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