faithfully vs strictly

faithfully

adv
  • In a faithful manner. 

  • A conventional formula for ending a letter, used when the salutation addresses the person for whom the letter is intended using an honorific. 

strictly

adv
  • In a strict manner. 

  • In a manner that applies to every member of a set or every interval of a function 

  • In a narrow or limited sense. 

  • In a limited manner; only 

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