dais vs scaffolding

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. 

scaffolding

noun
  • Source code etc. that is incomplete and serves as a basis for further development. 

  • Any framework or support. 

  • A temporary modular system of tubes (or formerly wood) forming a framework used to support people and material in the construction or repair of buildings and other large structures. 

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