arch vs plafond

arch

noun
  • An architectural element having the shape of an arch 

  • An inverted U shape. 

  • Any place covered by an arch; an archway. 

  • Curved part of the bottom of a foot. 

  • A natural arch-shaped opening in a rock mass. 

  • An arch-shaped arrangement of trapezoidal stones, designed to redistribute downward force outward. 

verb
  • To form into an arch shape. 

  • To cover with an arch or arches. 

adj
  • principal; primary 

  • knowing, clever, mischievous 

plafond

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

  • The tibial plafond. 

  • A painting or decoration on a ceiling. 

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