covet vs set one's heart on

covet

verb
  • To wish for with eagerness; to desire possession of, often enviously. 

  • To long for inordinately or unlawfully; to hanker after (something forbidden). 

  • To yearn; to have or indulge an inordinate desire, especially for another's possession. 

set one's heart on

verb
  • To desire with intensity and commitment, to earnestly long for. 

How often have the words covet and set one's heart on occurred in a corpus of books? (source: Google Ngram Viewer )