harvestman vs hired hand

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. 

hired hand

noun
  • A person who is employed to perform routine chores and manual labor, especially on a farm or ranch. 

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