plafond vs roofing

plafond

noun
  • A ceiling, especially one that is ornately decorated. 

  • The tibial plafond. 

  • A painting or decoration on a ceiling. 

roofing

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

  • The process of constructing a roof or roofs. 

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

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