countryside vs purlieu

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. 

purlieu

noun
  • The outskirts of any place; an adjacent district; the environs or neighborhood. 

  • The ground on the edges of a forest, especially when partly subject to the same forest laws concerning game hunting etc. 

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