dejection vs heartbreak

dejection

noun
  • A state of melancholy or depression; low spirits, the blues. 

  • The act of humbling or abasing oneself. 

  • A low condition; weakness; inability. 

heartbreak

noun
  • overwhelming mental anguish or grief, especially that caused by loss or disappointment 

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