dysthymia vs languor

dysthymia

noun
  • A tendency to be depressed, without hope. 

  • A form of clinical depression, characterized by low-grade depression which lasts at least 2 years. 

languor

noun
  • Melancholy caused by lovesickness, sadness, etc.; (countable) an instance of this. 

  • A state of the body or mind caused by exhaustion or disease and characterized by a languid or weary feeling; lassitude; (countable) an instance of this. 

  • Dullness, sluggishness; lack of vigour; stagnation. 

  • Listless indolence or inactivity, especially if enjoyable or relaxing; dreaminess; (countable) an instance of this. 

  • Heavy humidity and stillness of the air. 

verb
  • To languish. 

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