rock cocaine vs white lady

rock cocaine

noun
  • The off-white, crystal-like form of crack cocaine. 

white lady

noun
  • Cocaine. 

  • A cocktail made from creme de menthe, Cointreau, lemon juice and an egg white 

  • A female ghost dressed in white, who is associated with local legends of tragedy. 

  • Used other than figuratively or idiomatically: see white, lady. 

How often have the words rock cocaine and white lady occurred in a corpus of books? (source: Google Ngram Viewer )