clearly vs decidedly

clearly

adv
  • In a clear manner. 

  • To a degree clearly discernible. 

  • Without a doubt; obviously. 

decidedly

adv
  • In a manner which leaves little question; definitely, clearly. 

  • In a decided or final manner; resolutely. 

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