expanse vs old sod

expanse

noun
  • A wide stretch, usually of sea, sky, or land. 

  • An amount of spread or stretch. 

old sod

noun
  • The old country; one's place of origin. 

  • Used other than figuratively or idiomatically: see old, sod (person). 

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