gherao vs lie-in

gherao

noun
  • A protest in which a group of people surrounds a politician, building, etc. until demands are met. 

verb
  • To surround for this purpose. 

lie-in

noun
  • A form of protest where a group of people lie down in a public area. 

  • A period spent lying in bed for longer than usual after one has woken up. 

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