repining vs wretchedness

repining

noun
  • The act of fretting or feeling discontent or of murmuring. 

wretchedness

noun
  • An unhappy state of mental or physical suffering. 

  • A state of prolonged misfortune, privation, or anguish. 

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