agriculturalist vs harvestman

agriculturalist

noun
  • A farmer; one involved with agrarian business. 

  • An expert in agriculture who advises farmers. 

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. 

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