fir vs wax apple

fir

noun
  • A conifer of the genus Abies. 

  • Any pinaceous conifer of related genera, especially a Douglas fir (Pseudotsuga) or a Scots pine (Pinus sylvestris). 

  • Wood of such trees. 

wax apple

noun
  • the fruit of this plant 

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

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