cranberry vs whortle bush

cranberry

noun
  • A shrub belonging to the section Vaccinium sect. Oxycoccus of the genus Vaccinium. 

  • The edible red berry of that shrub. 

  • An intense red colour, like that of a cranberry 

adj
  • Of the intense red colour of a cranberry. 

whortle bush

noun
  • Any of several shrubs belonging to the genus Vaccinium, bearing fruit known as whortleberries. 

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