conventicle vs tweetup

conventicle

noun
  • The place where such a meeting is held. 

  • A secret, unauthorized or illegal religious meeting. 

  • A Quaker meetinghouse. 

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

tweetup

noun
  • A meeting in person organised on the social networking web site Twitter. 

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