reefer vs skunkweed

reefer

noun
  • Marijuana. 

  • A refrigerated, insulated trailer, ship or shipping container. 

  • a refrigerator car (type of boxcar). 

  • A marijuana cigarette. 

  • Someone who reefs sails, especially a midshipman. 

  • A reefer jacket; a close-fitting jacket or short coat of thick cloth. 

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 reefer and skunkweed occurred in a corpus of books? (source: Google Ngram Viewer )