green dragon vs stink weed

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. 

stink weed

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