dais vs lectern

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. 

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. 

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