guesthouse vs roadhouse

guesthouse

noun
  • A small house near a main house, for lodging visitors. 

  • A private house offering accommodation to paying guests; a boarding house; a bed and breakfast. 

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 guesthouse and roadhouse occurred in a corpus of books? (source: Google Ngram Viewer )