lectern vs tribune

lectern

noun
  • A stand with a slanted top used to support a bible from which passages are read during a church service. 

  • A similar stand to support a lecturer's notes. 

tribune

noun
  • The domed or vaulted apse in a Christian church that houses the bishop's throne. 

  • (Latin tribunus militum, "tribune of the soldiers"): an officer of the Roman army who ranked below the legate and above the centurion. 

  • A place or an opportunity to speak, to express one's opinion; a platform or pulpit. 

  • A protector of the people. 

  • An elected official in Ancient Rome. 

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