datura vs green dragon

datura

noun
  • A plant of the genus Datura, known for its trumpet-shaped flowers and poisonous properties. 

green dragon

noun
  • A tincture of cannabis, typically made by soaking the flowers, leaves, or stems in ethyl alcohol. 

  • Used other than figuratively or idiomatically: see green, dragon. 

  • Any of several plants in the family Araceae, including the North American species Arisaema dracontium and the Asian genus Pinellia. 

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