heavy-heartedness vs malaise

heavy-heartedness

noun
  • sadness, depression, or melancholy. 

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