importantly vs in earnest

importantly

adv

  • In an important manner. 

  • Used to mark a statement as having importance. 

in earnest

adv

  • Having a sincere intent. 

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

adj

  • Sincere; determined; truthful. 

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