cranberry vs partridgeberry

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. 

partridgeberry

noun
  • The berry of such a plant. 

  • lingonberry, Vaccinium vitis-idaea 

  • teaberry, Gaultheria procumbens 

  • squaw vine, Mitchella repens 

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