Camberwell carrot vs reefer

Camberwell carrot

noun
  • A large cannabis joint. 

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