plum blossom vs wax apple

plum blossom

noun
  • The blossom of the tree. 

  • A tree, Prunus mume, native to East Asia bearing an apricot-like fruit; the Japanese apricot or Chinese plum. 

  • Used other than figuratively or idiomatically: see plum, blossom. 

wax apple

noun
  • the fruit of this plant 

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

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