cultivator vs mower

cultivator

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

  • A person who cultivates. 

mower

noun
  • A lawnmower, a machine used to cut grass on lawns. 

  • A person who cuts grass. 

  • A farm machine used in hay production (sickle mower, finger-bar mower). 

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