bow and arrow vs nunchaku

bow and arrow

noun
  • A weapon consisting of a bow and a supply of arrows, often kept in a quiver. 

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 bow and arrow and nunchaku occurred in a corpus of books? (source: Google Ngram Viewer )