malady vs malaise

malady

noun
  • A moral or mental defect or disorder. 

  • Any ailment or disease of the body; especially, a lingering or deep-seated disorder. 

malaise

noun
  • An ambiguous feeling of mental or moral depression. 

  • A feeling of general bodily discomfort, fatigue or unpleasantness, often at the onset of illness. 

  • Ill will or hurtful feelings for others or someone. 

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