Grazer vs farmer

Grazer

noun
  • A native or inhabitant of Graz. 

farmer

noun
  • The lord of the field, or one who farms the lot and cope of the crown. 

  • A person who works the land and/or who keeps livestock, especially on a farm. 

  • One who takes taxes, customs, excise, or other duties, to collect for a certain rate per cent. 

  • regular person; someone who did not receive a prestigious scholarship 

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