cayenne pepper vs pepper spray

cayenne pepper

noun
  • Any of several very hot chilli peppers. 

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

pepper spray

noun
  • A non-lethal chemical agent derived from peppers used in riot control and personal self-defense. 

verb
  • To douse (someone or something) with pepper spray. 

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