long for vs mourn

long for

verb
  • To miss (someone). 

  • To have a desire for (a thing or an event). 

adj
  • likely to remain for a long time 

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 long for and mourn occurred in a corpus of books? (source: Google Ngram Viewer )