musket vs tear gas

musket

noun
  • A male Eurasian sparrowhawk (Accipiter nisus). 

  • A kind of firearm formerly carried by the infantry of an army, originally fired by means of a match, or matchlock, for which several mechanical appliances (including the flintlock, and finally the percussion lock) were successively substituted; ultimately superseded by the rifle. 

tear gas

verb
  • To use tear gas. 

noun
  • Any lachrymatory, non-lethal chemical compound that causes the eyes to sting and water and/or irritates the respiratory system, mostly used for controlling crowds during riots or as self-defense. 

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