blackthorn vs lathi

blackthorn

noun
  • A stick or staff taken from this tree. 

  • A large shrub or small tree, Prunus spinosa, that is native to Europe, western Asia, and north Africa. It has a dark bark and bears thorns. 

lathi

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

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

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