cayenne pepper vs long pepper

cayenne pepper

noun
  • Any of several very hot chilli peppers. 

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

long pepper

noun
  • The flowering vine Piper longum in the genus Piper (pepper) of family Piperaceae, cultivated for its characteristically long fruit, which is usually dried and used as a spice and seasoning. 

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