daddy longlegs vs grandfather-graybeard

daddy longlegs

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

  • The cranefly; any insect of the suborder Tipulomorpha. 

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

grandfather-graybeard

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