gardener vs mower

gardener

noun
  • One who gardens; one who grows plants or cultivates a garden. 

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 gardener and mower occurred in a corpus of books? (source: Google Ngram Viewer )