dais vs theater

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. 

theater

noun
  • A place or building, consisting of a stage and seating, in which an audience gathers to watch plays, musical performances, public ceremonies, and so on. 

  • A conspicuous but unproductive display of action. 

  • Any place rising by steps like the seats of a theater. 

  • An operating theatre or locale for human experimentation. 

  • A cinema. 

  • Drama or performance as a profession or art form. 

  • A region where a particular action takes place; a specific field of action, usually with reference to war. 

  • A lecture theatre. 

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