constantly vs quotidianly

constantly

adv
  • Recurring regularly. 

  • In an unchangeable or invariable manner; in every case. 

  • In a constant manner; occurring continuously; persistently. 

quotidianly

adv
  • Occurring on a quotidian basis; daily or commonplace. 

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