polling station vs voting booth

polling station

noun
  • a place where voters go to cast their ballot in an election or referendum; a voting station 

voting booth

noun
  • A small enclosed compartment where a voter may register a vote in private; it may house some voting machine, or just have a pencil for marking a voting slip. 

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