curtilage vs grounds

curtilage

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

grounds

noun
  • The collective land areas that compose a larger area. 

  • The sediment at the bottom of a liquid, or from which a liquid has been filtered. 

  • Basis or justification for something. 

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