boxberry vs deerberry

boxberry

noun
  • The teaberry, Gaultheria procumbens. 

deerberry

noun
  • Gaultheria procumbens (Eastern teaberry or checkerberry), or its fruit. 

  • Maianthemum dilatatum (snakeberry), or its fruit. 

  • Mitchella repens (partridgeberry), or its fruit. 

  • Vaccinium stamineum (squaw huckleberry), or its fruit. 

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