courtyard vs terrasse

courtyard

noun
  • An area, open to the sky, partially or wholly surrounded by walls or buildings. 

terrasse

noun
  • terrace, patio 

  • A representation of the ground or a terrace, serving as the base for another object. 

verb
  • To terrace; to supply with a terrace or cut into terraces. 

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