bitter almond vs wild almond

bitter almond

noun
  • A tree of the species Brabejum stellatifolium (order Proteales). 

  • The seed of this tree, which is unpalatably bitter and bears many times the cyanide of the sweet almond. 

  • A tree of the species Prunus amygdalus (order Rosales). 

wild almond

noun
  • Brabejum stellatifolium, native to South Africa 

  • Used other than figuratively or idiomatically: see wild, almond. A wild-growing almond tree (Prunus amygdalus, syn. Prunus dulcis), native to the Middle East and South Asia. 

  • Prunus fasciculata, native to the southwestern United States 

  • Sterculia foetida, native to the Old World tropics 

  • Irvingia malayana, native to southeast Asia 

  • Prunus turneriana, native to Papua New Guinea and Australia 

How often have the words bitter almond and wild almond occurred in a corpus of books? (source: Google Ngram Viewer )