cropper vs harvestman

cropper

noun
  • A person who nurtures and gathers a crop. 

  • A fall, a tumble; a decided failure. 

  • A variety of plant producing a good harvest. 

  • A machine for cropping, as for shearing off bolts or rod iron, or for facing cloth. 

  • A breed of domestic pigeon with large crop. 

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 cropper and harvestman occurred in a corpus of books? (source: Google Ngram Viewer )