gunpowder tea vs hemp

gunpowder tea

noun
  • A form of Chinese green tea in which each leaf has been rolled into a small round pellet. 

hemp

noun
  • Various products of this plant, including fibres and the drug cannabis. 

  • A tall annual herb, Cannabis sativa, native to Asia. 

  • The gallows. 

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