cattle market vs singles bar

cattle market

noun
  • A place, such as a bar or nightclub, that people visit in order to meet partners for casual sex. 

  • A market where people buy and sell cows. 

singles bar

noun
  • A bar or similar establishment for unattached people to meet. 

How often have the words cattle market and singles bar occurred in a corpus of books? (source: Google Ngram Viewer )