lie-in vs vigil

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. 

vigil

noun
  • A quiet demonstration in support of a cause. 

  • A period of observation or surveillance at any hour. 

  • An instance of keeping awake during normal sleeping hours, especially to keep watch or pray. 

  • The eve of a religious festival in which staying awake is part of the ritual devotions. 

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