depressed vs happy as a pig in mud

depressed

adj
  • Unhappy; despondent. 

  • Reduced to a lower degree or form. 

  • Suffering damaging effects of economic recession. 

  • Suffering from clinical depression. 

happy as a pig in mud

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