sincerely vs unassumingly

sincerely

adv
  • In a sincere or earnest manner; honestly. 

  • A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended by his or her name. 

unassumingly

adv
  • In an unassuming manner. 

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