heedfully vs in earnest

heedfully

adv
  • In a heedful manner. 

in earnest

adv
  • Having a sincere intent. 

  • With considerable commitment, determination, or effect; significantly. 

adj
  • Sincere; determined; truthful. 

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