chandelier vs luminaire

chandelier

noun
  • A branched, often ornate, lighting fixture suspended from the ceiling 

  • A fictional bidder used to increase the price at an auction. 

  • An endoilluminator used in eye surgery. 

luminaire

noun
  • An electrical device that contains an electric lamp that provides illumination. 

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