peanut vs pistachio

peanut

noun
  • A legume resembling a nut, the fruit of the plant Arachis hypogaea. 

  • A very small clam. 

  • See peanuts (“very small amount”). 

verb
  • To pull on somebody's tie as a prank, causing the knot to tighten. 

pistachio

noun
  • The nutlike fruit of this tree. 

  • A pale green colour, like that of a pistachio seed. 

  • A deciduous tree (Pistacia vera) grown in parts of Asia for its drupaceous fruit. 

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