deadlock vs happy hour

deadlock

verb
  • To cause or come to a deadlock. 

noun
  • A standstill resulting from the opposition of two evenly matched forces; a stalemate or impasse. 

  • An inability to continue due to two programs or devices each requiring a response from the other before completing an operation. 

happy hour

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

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

  • Flowers. 

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