cayenne pepper vs red pepper

cayenne pepper

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

  • Any of several very hot chilli peppers. 

red pepper

noun
  • Spicy pepper. 

  • A red-colored, ripe, bell or sweet pepper. Unripe peppers of this variety are green and edible but not as sweet. 

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