grazier vs sodbuster

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. 

sodbuster

noun
  • An agricultural labourer or farmer who breaks up the land, as with a plough. 

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