ganj vs reefer

ganj

noun
  • ganja. 

  • A market. 

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. 

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