convivial vs happy as a pig in shit

convivial

adj
  • Having elements of a feast or of entertainment, especially when it comes to eating and drinking, with accompanying festivity 

happy as a pig in shit

adj
  • Extremely happy; obviously satisfied and carefree. 

How often have the words convivial and happy as a pig in shit occurred in a corpus of books? (source: Google Ngram Viewer )