elegiac vs over the moon

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. 

over the moon

prep
  • Delighted, thrilled. 

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