discontent vs serenity

discontent

noun
  • Dissatisfaction. 

  • A longing for better times or circumstances. 

  • A discontented person; a malcontent. 

verb
  • To deprive of contentment; to make uneasy; to dissatisfy. 

adj
  • Not content; discontented; dissatisfied. 

serenity

noun
  • A lack of agitation or disturbance. 

  • The state of being serene; calmness; peacefulness. 

  • A title given to a reigning prince or similar dignitary. 

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