sweet pepper vs white pepper

sweet pepper

noun
  • The fruit of a non-spicy cultivar of pepper, Capsicum annuum, marketed in green-, red-, yellow- and orange-skinned varieties. 

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 sweet pepper and white pepper occurred in a corpus of books? (source: Google Ngram Viewer )