gunpowder tea vs high tea

gunpowder tea

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

high tea

noun
  • Formal afternoon tea. 

  • A late afternoon or early evening meal, typically consisting of a cooked dish with bread and butter and tea. 

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