infirmity vs malaise

infirmity

noun
  • a moral weakness or defect 

  • feebleness, frailty or ailment, especially due to old age. 

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 infirmity and malaise occurred in a corpus of books? (source: Google Ngram Viewer )