languish vs mourn

languish

verb
  • To live in miserable or disheartening conditions. 

  • To pine away in longing for something; to have low spirits, especially from lovesickness. 

  • To be neglected; to make little progress, be unsuccessful. 

  • To lose strength and become weak; to be in a state of weakness or sickness. 

mourn

verb
  • To utter in a sorrowful manner. 

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

  • To wear mourning. 

noun
  • Sorrow, grief. 

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

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