breathing spell vs happy hour

breathing spell

noun
  • An opportunity to rest or give thought to a situation; a short respite. 

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. 

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