inkberry vs pigeonweed

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) 

pigeonweed

noun
  • Synonym of pokeweed (“the plant Phytolacca americana”) 

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