fun house vs red-light district

fun house

noun
  • A brothel. 

  • A funhouse. 

  • Used other than figuratively or idiomatically: see fun, house. 

  • A carnival or amusement park attraction through which customers ramble to see unexpected clowns, distortion mirrors, ramps, slides, stairs, rotating barrel slides, etc. 

red-light district

noun
  • A part of an urban area where prostitution and sex-oriented businesses are concentrated. 

How often have the words fun house and red-light district occurred in a corpus of books? (source: Google Ngram Viewer )