barong vs revolver

barong

noun
  • A cutting weapon similar to a cleaver, with a thick back and thin razor-like edge, used by the Moros of the Philippines. 

revolver

noun
  • Any (personal) firearm with such a mechanism. 

  • A handgun with a revolving chamber enabling several shots to be fired without reloading. 

  • Synonym of revolving line of credit 

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