dais vs tribune

dais

noun
  • A raised platform in a room for a high table, a seat of honour, a throne, or other dignified occupancy, such as ancestral statues; a similar platform supporting a lectern, pulpit, etc., which may be used to speak from. 

  • The canopy over an altar, etc. 

  • A bench, a settle, a pew. 

tribune

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

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

  • A protector of the people. 

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

  • An elected official in Ancient Rome. 

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