gunpowder vs gunpowder tea

gunpowder

noun
  • Idli podi/milagai podi; ground-up dry spices mixed with oil and ghee and served alongside idli or dosa. 

  • An explosive mixture of saltpetre (potassium nitrate), charcoal and sulphur; formerly used in gunnery but now mostly used in fireworks. 

gunpowder tea

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

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