katara vs nunchaku

katara

noun
  • An Indian push dagger with an H-shaped handle, used predominantly ceremonially, and rarely as a weapon. 

nunchaku

noun
  • A weapon originating from Okinawa, Japan, consisting of two sticks joined by a chain or cord. 

  • The skill of using this weapon in martial arts. 

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