forty-five vs howitzer

forty-five

noun
  • A .45-caliber firearm. 

num
  • Cardinal number after forty-four and before forty-six. 

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. 

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