pine nut vs pinecone

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. 

pinecone

noun
  • A seed-bearing conical fruit of a pine tree. 

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