pinecone vs soursop

pinecone

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

soursop

noun
  • The tart, spiny, yellow-green fruit of this tree. 

  • A small tropical evergreen tree, Annona muricata. 

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