drapery vs roofing

drapery

noun
  • The occupation of a draper; cloth-making, or dealing in cloth. 

  • A piece of cloth, hung vertically as a curtain; a drape. 

  • Cloth draped gracefully in folds. 

  • Cloth, or woollen materials in general. 

roofing

noun
  • The process of constructing a roof or roofs. 

  • A way of travel which consists in clambering over the roofs of skyscrapers. 

  • Material used on the outside of a roof, such as shingles. 

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