cherry plum vs damson

cherry plum

noun
  • The fruit of such a tree. 

  • Prunus cerasifera, a deciduous ornamental Eurasian shrub or small tree, having white flowers and small red to yellow edible fruits. 

damson

noun
  • The edible fruit of this tree. 

  • A subspecies of plum tree, Prunus domestica subsp. insititia, native to Eurasia. 

adj
  • The color of the fruit of this tree, a very deep purple. 

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