cosh vs shillelagh

cosh

noun
  • A weapon made of leather-covered metal similar to a blackjack. 

  • A blunt instrument such as a bludgeon or truncheon. 

verb
  • To strike with a weapon of this kind. 

adj
  • cosy; snug 

shillelagh

noun
  • A wooden (traditionally blackthorn (sloe) wood) club ending with a large knob. 

  • Any cudgel, whether or not of Irish origin. 

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