happy hour vs intermission

happy hour

noun
  • Any small gathering, usually in the afternoon or early evening, set aside to relax and have a drink. 

  • A time of day, usually in the afternoon or early evening, when a bar or pub offers its drinks at a discounted price. 

  • Flowers. 

intermission

noun
  • A break between two performances or sessions, such as at a concert, play, seminar, or religious assembly. 

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