black alder vs common winterberry

black alder

noun
  • Wood or other product of the tree. 

  • A tree (Alnus glutinosa), of many practical uses, growing in moist conditions in Europe. 

  • American winterberry, Ilex verticillata. 

common winterberry

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