revel vs rue

revel

noun
  • A kind of dance. 

  • An instance of merrymaking; a celebration. 

  • A wake for the dead. 

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

  • To take delight (in something). 

rue

verb
  • To repent of or regret (some past action or event); to wish that a past action or event had not taken place. 

noun
  • Any of various perennial shrubs of the genus Ruta, especially the herb Ruta graveolens (common rue), formerly used in medicines. 

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