mountain apple vs rose apple

mountain apple

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

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

rose apple

noun
  • Syzygium malaccense, the Malay rose apple. 

  • Angophora costata, a common woodland and forest tree of Eastern Australia. 

  • Syzygium aqueum, the watery rose apple. 

  • Syzygium jambos, the jambu fruit. 

  • Syzygium samarangense, the Semarang rose-apple or wax jambu. 

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