happy hour vs vacation

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. 

vacation

noun
  • A holiday; a stretch of leisure time away from work or duty and devoted to rest or pleasure. 

  • A period during which official activity or business is formally suspended; an official holiday from university, law courts etc. 

  • Freedom from some business or activity. 

  • The act of vacating something; moving out. 

  • An extended period of time away from work or school. 

  • The act of making legally void. 

verb
  • To spend or take a vacation. 

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