difficult vs picnic

difficult

adj
  • Hard to manage, uncooperative, troublesome. 

  • Hard, not easy, requiring much effort. 

picnic

noun
  • 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. 

  • 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 difficult and picnic occurred in a corpus of books? (source: Google Ngram Viewer )