cayenne pepper vs green pepper

cayenne pepper

noun
  • A powder condiment or spice formed from the dried chilli pepper varieties above. 

  • Any of several very hot chilli peppers. 

green pepper

noun
  • A green variety of dried peppercorn, made from the unripe berries by treating them in a manner that retains the green colour. 

  • The green, unripe, form of the sweet bell pepper. Popular in cooking, especially Italian cuisine. The unripe bell pepper is green and generally changes to other colors as it matures, cultivars exist for red, orange, yellow and other shades. 

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