nightspot vs watering hole

nightspot

noun
  • An establishment that is open late at night, especially one that provides entertainment, such as a nightclub. 

watering hole

noun
  • A bar or other local drinking establishment. 

  • A depression in which water collects and where animals come to drink. 

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