pignolia vs pine nut

pignolia

noun
  • A pine nut; the edible seed of a pine tree. 

pine nut

noun
  • The edible seed of any of several species of evergreen pine, especially Pinus pinea, Pinus cembra, and Pinus cembroides. 

  • The flavor that results from mixing pineapple and coconut. 

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