lingonberry vs mountain cranberry

lingonberry

noun
  • A berry-bearing shrub, Vaccinium vitis-idaea, native to the cool temperate areas of the Northern Hemisphere. 

  • The berry of this shrub. 

mountain cranberry

noun
  • The cowberry, Vaccinium vitis-idaea 

  • The mountain bearberry, Arctostaphylos alpina 

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