jujube vs wax apple

jujube

noun
  • The fruit of this tree. 

  • 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. 

wax apple

noun
  • the fruit of this plant 

  • a tropical plant, Syzygium samarangense, bearing an edible fruit 

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