festivity vs picnic

festivity

noun
  • A festival or similar celebration. 

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

picnic

noun
  • An informal social gathering, usually in a natural outdoor setting, to which the participants bring their own food and drink. 

  • An easy or pleasant task. 

  • The meal eaten at such a gathering. 

  • A cut of pork from the shoulder area (above the front leg) of a pig. 

verb
  • To take part in a picnic. 

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