grazier vs ranchero

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. 

ranchero

noun
  • A ranch or rancho owner 

  • a ranch or rancho worker 

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