damson vs petunia

damson

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

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

  • The edible fruit of this tree. 

petunia

adj
  • Of a dark purple colour, like that of some petunia flowers. 

noun
  • Any of the flowering plants of genus Petunia, of which most garden varieties are hybrids. 

  • a homosexual 

  • A dark purple colour, like that of some petunia flowers. 

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