conclave vs sederunt

conclave

noun
  • A private meeting; a closed or secret assembly. 

  • A closed meeting in which the elector cardinals of the Roman Catholic Church choose a new pope. 

  • The group of cardinals involved in a conclave. 

  • The set of apartments in which the elector cardinals are secluded while a conclave takes place. 

sederunt

noun
  • A formal meeting, especially of a judicial or ecclesiastical body. 

  • Those people present at such a meeting. 

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