dejection vs the dumps

dejection

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

  • The act of humbling or abasing oneself. 

  • A low condition; weakness; inability. 

the dumps

noun
  • Synonym of the pits 

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