malaise vs sickliness

malaise

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

  • An ambiguous feeling of mental or moral depression. 

  • Ill will or hurtful feelings for others or someone. 

sickliness

noun
  • The state or characteristic of weakness, incapacity, or physical distress due to poor health, especially of a chronic nature. 

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