brass knuckles vs fascine knife

brass knuckles

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

fascine knife

noun
  • A large, heavy knife or short sword used as a sidearm and tool by 17th to 19th century infantry and artillery. 

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