discontent vs grumbler

discontent

noun
  • A discontented person; a malcontent. 

  • Dissatisfaction. 

  • A longing for better times or circumstances. 

adj
  • Not content; discontented; dissatisfied. 

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

grumbler

noun
  • A person who persistently grumbles; a complainer 

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