jelly bean vs jujube

jelly bean

noun
  • A small, bean-shaped, chewy candy/sweet with a firm coating and a jelly-like center, made of sugar, flavoring, coloring and sometimes starch or other thickener, and usually sold assorted in a wide variety of flavors and bright colors. 

jujube

noun
  • A type of candy; specific type varies by country. 

  • A fruit-bearing tree, Ziziphus mauritiana. 

  • The fruit of this tree, fructus jujubae. 

  • The sweet and edible drupes (fruits) of several Mediterranean and African species of small trees. 

  • A fruit-bearing tree, Ziziphus jujuba or Ziziphus zizyphus. 

  • The fruit of this tree. 

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