green pepper vs white pepper

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. 

white pepper

noun
  • A spice consisting of the light-colored seed of the black pepper fruit without the dark-colored pulp and skin. Used as a spice in light colored foods such as cream sauces. 

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