convening vs conventicle

convening

noun

  • An assembly; a meeting. 

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. 

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