lathi vs shillelagh

lathi

noun
  • A heavy stick or club, usually used by policemen. 

  • A martial art based on stick fighting originally practiced in India. 

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 lathi and shillelagh occurred in a corpus of books? (source: Google Ngram Viewer )