delight vs gladden

delight

verb
  • To give delight to; to affect with great pleasure; to please highly. 

  • To have or take great pleasure. 

noun
  • Joy; pleasure. 

  • Something that gives great joy or pleasure. 

gladden

verb
  • To cause (something) to become more glad. 

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