horseradish vs hot pepper

horseradish

noun
  • A pungent condiment made from the root of the plant. 

  • A plant of the mustard family, Armoracia rusticana. 

hot pepper

noun
  • Any of various small peppers of highly notable pungency or heat. 

  • Any of the plants that bear such fruit, especially the species Capsicum annuum and Capsicum frutescens and their numerous subspecies, varieties, or cultivars. 

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