grazier vs rancher

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. 

rancher

noun
  • A person who operates a ranch. 

  • A ranch-style house, a ranchhouse. 

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