damson vs mulberry

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. 

mulberry

noun
  • The fruit of this tree. 

  • Any of several trees, of the genus Morus, having edible fruits. 

  • A dark purple colour tinted with red. 

adj
  • Of a dark purple color tinted with red. 

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