bramble vs wolfberry

bramble

noun
  • Any of many closely related thorny plants in the genus Rubus including the blackberry and likely not including the raspberry proper. 

  • Any thorny shrub. 

  • A cocktail of gin, lemon juice, and blackberry liqueur. 

  • The soft fruit borne by the species Rubus fruticosus formed of a black (when ripe) cluster of drupelets. 

wolfberry

noun
  • The berry of this plant. 

  • Any of flowering species of the genus Lycium. 

  • Lycium barbarum or Lycium chinense 

  • The western snowberry, Symphoricarpos occidentalis, a shrub native to nothern and central North America. 

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