howitzer vs musket

howitzer

noun
  • A cannon that combines certain characteristics of field guns and mortars, delivering projectiles with medium velocities, usually with relatively high trajectories; normally a cannon with a tube length of 20 to 30 calibers. 

  • A powerfully hit shot. 

verb
  • To attack with a howitzer. 

musket

noun
  • 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appliances (including the flintlock, and finally the percussion lock) were successively substituted; ultimately superseded by the rifle. 

  • A male Eurasian sparrowhawk (Accipiter nisus). 

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