daddy longlegs vs harvestman

daddy longlegs

noun
  • Any (non-spider) arachnid of the order Opiliones, mostly with long thin legs; the harvestman. 

  • The daddy long-legs spider, any spider of the family Pholcidae. 

  • The cranefly; any insect of the suborder Tipulomorpha. 

harvestman

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

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

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