curtilage vs piazza

curtilage

noun
  • The area immediately surrounding a house, especially dooryard areas and sometimes including closely associated buildings and structures. 

piazza

noun
  • A roofed gallery or arcade (for example around a public square or in front of a building). 

  • A public square, especially in Italian cities. 

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