addedly vs relatedly

addedly

adv
  • In addition; additionally. 

relatedly

adv
  • In a related manner. 

  • Used to indicate that the accompanying statement is related (connected) to a preceding statement or occurrence. 

  • Used to indicate that the accompanying statement may not be true, but has been said to be true. 

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