difficulty vs peace

difficulty

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

  • An obstacle that hinders achievement of a goal. 

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

  • An objection. 

  • An awkward situation or quarrel. 

  • That which cannot be easily understood or believed. 

peace

noun
  • A state of tranquility, quiet, and harmony; absence of violence. For instance, a state free from civil disturbance. 

  • A state free of war, in particular war between different countries. 

  • A state free of oppressive and unpleasant thoughts and emotions. 

  • Harmony in personal relations. 

intj
  • Peace out; goodbye. 

verb
  • To make peace; to put at peace; to be at peace. 

  • To peace out. 

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