arbalest vs howitzer

arbalest

noun
  • A crossbow. 

  • A crossbowman. 

howitzer

noun
  • A powerfully hit shot. 

  • 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. 

verb
  • To attack with a howitzer. 

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