bog bilberry vs cranberry

bog bilberry

noun
  • A shrub native of the cool temperate areas of northern hemisphere, Vaccinium uliginosum, and the berry of that shrub. 

cranberry

noun
  • The edible red berry of that shrub. 

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

  • An intense red colour, like that of a cranberry 

adj
  • Of the intense red colour of a cranberry. 

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