comfortably vs fluently

comfortably

adv
  • In a comfortable manner. 

  • Easily; without effort or difficulty. 

fluently

adv
  • In a fluent manner, as having graceful movements. 

  • In a fluent manner, as expressing oneself easily, especially in a foreign language. 

  • In a fluent manner, as literally flowing. 

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