pigstick vs stab wound

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. 

stab wound

noun
  • A wound caused by stabbing. 

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