American winterberry vs inkberry

American winterberry

noun
  • Ilex verticillata, a species of holly native to eastern North America in the United States and southeast Canada, from Newfoundland west to Ontario and Minnesota, and south to Alabama. 

inkberry

noun
  • Ilex verticillata, American winterberry 

  • Scaevola plumieri, a fan flower 

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

  • Ilex glabra (winterberry, gallberry) 

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