dopehead vs snowbird

dopehead

noun
  • A person who frequently uses illicit, narcotic, or psychoactive drugs and has a drug addiction. 

snowbird

noun
  • A cocaine user. 

  • A person, usually one who is retired, who travels from a cold climate to a warmer one in the winter; one who overwinters elsewhere. 

  • The snow bunting (Plectrophenax nivalis). 

  • A bird, Junco hyemalis, the dark-eyed junco. 

  • A bird seen primarily in the winter time. 

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