round table vs sederunt

round table

noun
  • A conference at which participants of similar status discuss and exchange views. 

  • A television show segment in which pundits or reporters discuss current events. 

  • Used other than figuratively or idiomatically: see round, table. 

sederunt

noun
  • Those people present at such a meeting. 

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

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