cannabis vs skunkweed

cannabis

noun
  • The purified and decarboxylated resin of the cannabis plant used for medicinal purposes rather than for any intoxicating effects. 

  • A mildly euphoriant or sedating, intoxicating hallucinogenic drug prepared from various parts of this plant. 

  • A tall annual dioecious plant (Cannabis, especially Cannabis sativa), native to central Asia and having alternate, palmately divided leaves and tough bast fibers. 

skunkweed

noun
  • strong-smelling cannabis 

  • Any of several American plants that have an offensive odour, but especially Croton texensis and Polemonium viscosum 

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