winterberry vs yellow nightshade

winterberry

noun
  • The fruit of this plant. 

  • A species of holly native to the United States and Canada and producing red berries, Ilex verticillata. 

yellow nightshade

noun
  • Physalis crassifolia 

  • Solanum villosum 

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