inkberry vs pokeweed

inkberry

noun
  • Any plant of the genus Phytolacca, especially Phytolacca americana, the pokeweed. 

  • Ilex verticillata, American winterberry 

  • Scaevola plumieri, a fan flower 

  • Ilex glabra (winterberry, gallberry) 

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 inkberry and pokeweed occurred in a corpus of books? (source: Google Ngram Viewer )