coralberry vs partridgeberry

coralberry

noun
  • American winterberry, Ilex verticillata. 

  • Symphoricarpos orbiculatus, of eastern North America. 

  • Ardisia crenata of east Asia. 

  • A species of bromeliad, Aechmea fulgens, of Brazil, and which is often used as an ornamental plant. 

partridgeberry

noun
  • The berry of such a plant. 

  • lingonberry, Vaccinium vitis-idaea 

  • teaberry, Gaultheria procumbens 

  • squaw vine, Mitchella repens 

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