picnic vs potluck

picnic

noun
  • The meal eaten at such a gathering. 

  • An easy or pleasant task. 

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

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

verb
  • To take part in a picnic. 

potluck

noun
  • A shared meal consisting of whatever guests have brought (sometimes without prior arrangement); a potlatch; also, a dish of food brought to such a meal. 

  • Whatever is available in a particular situation. 

verb
  • To take part in a potluck, where each participant brings a meal to be shared by all. 

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