flophouse vs roadhouse

flophouse

noun
  • A cheap hotel or boarding house where many people sleep in large rooms. 

verb
  • To stay in a flophouse. 

roadhouse

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

  • A receiving house. 

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

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