pool hall vs roadhouse

pool hall

noun
  • A building where visitors pay to play billiards (pool). 

roadhouse

noun
  • A receiving house. 

  • An inn or similar establishment situated beside a road beyond the jurisdiction of a town or city. 

  • A truck stop located in a remote area, with basic accommodation facilities. 

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