mourn vs revel

mourn

verb
  • To express sadness or sorrow for; to grieve over (especially a death). 

  • To utter in a sorrowful manner. 

  • To wear mourning. 

noun
  • Sorrow, grief. 

  • A ring fitted upon the head of a lance to prevent wounding an adversary in tilting. 

revel

verb
  • To make merry; to have a happy, lively time. 

  • To take delight (in something). 

noun
  • A kind of dance. 

  • An instance of merrymaking; a celebration. 

  • A wake for the dead. 

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