capsicum vs cayenne pepper

capsicum

noun
  • The spicy fruit of the above plants, the bell pepper. 

  • Any of several tropical American plants, of the genus Capsicum, principally the species Capsicum annuum and Capsicum frutescens, that are cultivated as edible peppers. 

cayenne pepper

noun
  • Any of several very hot chilli peppers. 

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

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