harvestman vs mower

harvestman

noun
  • A field-worker who works to gather in the harvest. 

  • An order of terrestrial, non-venomous arachnids with often very long legs: Opiliones. 

mower

noun
  • A person who cuts grass. 

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

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

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