kushiyaki vs pigstick

kushiyaki

noun
  • A Japanese technique for serving chicken or other foods on a skewer. 

pigstick

noun
  • A stick that is used for stabbing. 

  • A staff that carries a flag or pennant above the mast of a sailboat. 

  • A waterjet disruptor used to disable explosive devices. 

verb
  • To stab. 

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