disdain vs rue

disdain

verb
  • To regard (someone or something) with strong contempt. 

noun
  • A feeling of contempt or scorn. 

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 disdain and rue occurred in a corpus of books? (source: Google Ngram Viewer )