gravy vs horseradish

gravy

noun
  • A pale sauce prepared from a roux with meat fat; a type of béchamel sauce. 

  • Unearned gain. 

  • Sauce used for pasta. 

  • A dark savoury sauce prepared from stock and usually meat juices; brown gravy. 

  • Extra benefit. 

  • Curry sauce. 

verb
  • To make gravy. 

horseradish

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

  • A plant of the mustard family, Armoracia rusticana. 

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