plum blossom vs ume

plum blossom

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

  • The blossom of the tree. 

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

ume

noun
  • Japanese apricot, a species of Asian plum, Prunus mume. 

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