elegiac vs melancholic

elegiac

adj
  • Expressing sorrow or mourning. 

  • Of or relating to an elegy. 

noun
  • A poem composed in the couplet style of classical elegies: a line of dactylic hexameter followed by a line of dactylic pentameter. 

melancholic

adj
  • Filled with or affected by melancholy—great sadness or depression, especially of a thoughtful or introspective nature. 

  • Pertaining to the melancholic temperament or its associated personality traits. 

noun
  • A person who is habitually melancholy. 

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