difficulty vs grief

difficulty

noun
  • The state of being difficult, or hard to do. 

  • Physical danger from the environment, especially with risk of drowning 

  • An obstacle that hinders achievement of a goal. 

  • An objection. 

  • An awkward situation or quarrel. 

  • That which cannot be easily understood or believed. 

grief

noun
  • Suffering, hardship. 

  • Emotional pain, generally arising from misfortune, significant personal loss, bereavement, misconduct of oneself or others, etc.; sorrow; sadness. 

  • Cause or instance of sorrow or pain; that which afflicts or distresses; trial. 

verb
  • To deliberately harass and annoy or cause grief to other players of a game in order to interfere with their enjoyment of it; especially, to do this as one’s primary activity in the game. 

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