mourn vs weep

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. 

weep

verb
  • To cry; to shed tears, especially when accompanied with sobbing or other difficulty speaking, as an expression of emotion such as sadness or joy. 

  • To produce secretions. 

  • To give off moisture in small quantities, e.g. due to condensation. 

  • To lament; to complain. 

  • To hang the branches, as if in sorrow; to be pendent; to droop; said of a plant or its branches. 

  • To flow in drops; to run in drops. 

noun
  • A session of crying. 

  • A sob. 

  • A lapwing; wipe, especially, a northern lapwing (Vanellus vanellus). 

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