green pepper vs pimento

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. 

pimento

noun
  • A tropical berry used to make allspice. 

  • A red sweet pepper, a cultivar of Capsicum annuum, used to make relish, stuffed into olives, or used as spice. 

  • The tree on which it grows. 

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