horseradish vs red pepper

horseradish

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

  • A plant of the mustard family, Armoracia rusticana. 

red pepper

noun
  • Spicy pepper. 

  • A red-colored, ripe, bell or sweet pepper. Unripe peppers of this variety are green and edible but not as sweet. 

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