in earnest vs significantly

in earnest

adv

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

  • Having a sincere intent. 

adj

  • Sincere; determined; truthful. 

significantly

adv

  • In a significant manner or to a significant extent. 

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