barong vs machine gun

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. 

machine gun

noun
  • A type of fully automatic firearm that fires bullets in rapid succession by a single action of the trigger and is capable of sustained fire. 

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