bombardment vs gunfire

bombardment

noun
  • heavy artillery fire 

  • the act of bombing, especially towns or cities 

  • the incidence of an intense stream of high-energy particles directed at a substance 

gunfire

noun
  • The use of gunpowder-type weapons, mainly cannon, as opposed to swords or bayonets. 

  • The time of firing of the morning gun or the evening gun. 

  • Shots from a gun or guns, typically creating loud report. 

  • Tea, a cup of tea, especially one served early in the morning before first parade. 

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