flintlock vs thirty-eight

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. 

thirty-eight

num

  • The cardinal number immediately following thirty-seven and preceding thirty-nine. 

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