chili pepper vs spice

chili pepper

noun
  • Any fruit of a plant of the botanical genus Capsicum, which has a spicy/burning flavour because it contains capsaicin. (Not all chili peppers are particularly spicy, but all true chili peppers contain some capsaicin, in contrast to e.g. the bell pepper, which is not a true chili pepper and does not.) 

spice

noun
  • The quality of being spicy. 

  • An aromatic odour. 

  • Appeal, interest; an attribute that makes something appealing, interesting, or engaging. 

  • A synthetic cannabinoid drug. 

  • Aromatic or pungent plant matter (usually dried) used to season or flavour food. 

  • Sweets, candy. 

  • A characteristic touch or taste; smack; flavour. 

verb
  • To add spice or spices to; season. 

  • To spice up. 

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