flintlock vs long Tom

flintlock

noun
  • An early type of firearm, using a spring-loaded flint to strike sparks into the firing pan. 

  • A type of lock used on muskets, rifles, and pistols from the early 17th to the mid-19th century. 

long Tom

noun
  • Any of various early cannon and field guns. 

  • A high-powered lens for long-distance filming or photography. 

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