canister shot vs tin can

canister shot

noun
  • Antipersonnel ammunition consisting of a cylindrical canister filled with round lead or iron balls. 

tin can

noun
  • A container, usually cylindrical, made out of sheet metal coated with tin, or (by extension) aluminum. 

  • A metal spaceship or space station. 

  • An inexpensive car. 

  • A motor home or trailer. 

  • A destroyer. 

How often have the words canister shot and tin can occurred in a corpus of books? (source: Google Ngram Viewer )