cayenne pepper vs chili powder

cayenne pepper

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

  • Any of several very hot chilli peppers. 

chili powder

noun
  • Pulverized dry chilis used for culinary purposes. 

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