Malay apple vs mountain apple

Malay apple

noun
  • A myrtaceous tree (Syzygium malaccense) native to Malaysia and Australia, or the fruit of this tree. 

mountain apple

noun
  • The Malay apple or pommerac (Syzygium malaccense). 

  • Used other than figuratively or idiomatically: see mountain, apple. 

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