malcontent vs sulky

malcontent

adj
  • Dissatisfied with current conditions; disaffected, discontented, rebellious. 

noun
  • A person who is not satisfied with current conditions; a discontented person, a rebel. 

sulky

adj
  • silent and withdrawn after being upset 

noun
  • Any carriage seating only the driver. 

  • A low two-wheeled cart, used in harness racing. 

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