brass knuckles vs smallsword

brass knuckles

noun
  • A weapon consisting of a metal reinforcement for the clenched fist, with finger holes molded in. 

smallsword

noun
  • A light one-handed sword, designed for thrusting, which evolved out of the longer and heavier rapier of the late Renaissance. 

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