conventicle vs horde

conventicle

noun
  • A secret, unauthorized or illegal religious meeting. 

  • The place where such a meeting is held. 

  • A Quaker meetinghouse. 

verb
  • To hold a secret, unauthorized or illegal religious meeting. 

horde

noun
  • A large number of people or things. 

  • A wandering troop or gang; especially, a clan or tribe of a nomadic people (originally Tatars) migrating from place to place for the sake of pasturage, plunder, etc.; a predatory multitude. 

verb
  • to travel en masse, to flock 

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