mourn vs pine

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. 

pine

verb
  • To grieve or mourn for. 

  • To inflict pain upon; to torment. 

  • To long, to yearn so much that it causes suffering. 

  • To languish; to lose flesh or wear away through distress. 

noun
  • The wood of this tree. 

  • Any tree (usually coniferous) which resembles a member of this genus in some respect. 

  • Any coniferous tree of the genus Pinus. 

  • A pineapple. 

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