black alder winterberry vs pokeweed

black alder winterberry

noun
  • A deciduous holly shrub, Ilex verticillata, native to eastern North America, growing best in moist circumstances. 

pokeweed

noun
  • A poisonous North American plant, Phytolacca americana, with reddish stems, broad leaves, clusters of white flowers, and dark purple berries. 

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