backroom vs booth

backroom

noun
  • A room near the rear of a premises, especially one that is only accessible to a privileged few and can be used as an inconspicuous meeting place. 

adj
  • Characterized by secrecy or anonymity. 

  • Of, relating to, or happening in a backroom. 

booth

noun
  • An enclosed table with seats, as in a diner or café. 

  • A small stall for the display and sale of goods. 

  • An enclosure for keeping animals. 

  • An enclosure just big enough to accommodate one standing person. 

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