countryside vs fresh air

countryside

noun
  • An area located outside of towns and cities; an area that is not urban or suburban; a rural area. 

  • Such part of a larger area. 

  • A rural landscape. 

fresh air

noun
  • The natural, clean air from outside, as opposed to the relatively stuffy air inside. 

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