Grazer vs cultivator

Grazer

noun
  • A native or inhabitant of Graz. 

cultivator

noun
  • A person who cultivates. 

  • Any of several devices used to loosen or stir the soil, either to remove weeds or to provide aeration and drainage. 

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