melancholy vs piteous

melancholy

adj
  • Affected with great sadness or depression. 

noun
  • Great sadness or depression, especially of a thoughtful or introspective nature. 

  • Black bile, formerly thought to be one of the four "cardinal humours" of animal bodies. 

piteous

adj
  • Provoking pity, compassion, or sympathy. 

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