black plum vs jambul

black plum

noun
  • Prunus domestica (European plum), the common cultivated plum 

  • Vitex doniana, native to Africa 

  • Prunus nigra (Canada plum), native to eastern North America 

  • Diospyros australis (yellow persimmon), native to eastern Australia 

  • Planchonella australis (black apple, yellow buttonwood, yellow bulletwood; syn. Pouteria australis), native to eastern Australia 

  • Syzygium cumini (Java plum), native to south and southeast Asia 

jambul

noun
  • The plum-like fruit of this tree. 

  • An evergreen tropical tree, Syzygium cumini. 

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