festivity vs national holiday

festivity

noun
  • A festival or similar celebration. 

  • An experience or expression of celebratory feeling, merriment, gaiety. 

national holiday

noun
  • A public holiday. 

  • A statutory holiday enacted by a country to commemorate the country itself. 

How often have the words festivity and national holiday occurred in a corpus of books? (source: Google Ngram Viewer )