teaberry vs whortleberry

teaberry

noun
  • A berry which is the fruit of a small shrub native to northeastern North America, Gaultheria procumbens (eastern teaberry, American wintergreen, boxberry, checkerberry). 

  • A pinkish-white edible berry which grows in the Falkland Islands, where the fruits are harvested annually by Islanders to make cakes, confectionary and pavlovas. On the South American mainland the leaves are brewed for tea (Myrteola nummularia). 

whortleberry

noun
  • A berry of one of these shrubs. 

  • Vaccinium vitis-idaea (lingonberry or red whortleberry); 

  • Vaccinium myrtillus (bilberry or blue whortleberry); 

  • Vaccinium uliginosum (bog whortleberry or bilberry). 

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