dagga vs skunkweed

dagga

noun
  • Indian hemp, Cannabis sativa subsp. indica, or a similar plant of the species Leonotis leonurus. 

  • Cement. 

skunkweed

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

  • strong-smelling cannabis 

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