decode vs make a dent

decode

verb
  • To figure out something difficult to interpret. 

  • To convert from an encrypted form to plain text. 

noun
  • A product of decoding 

  • Output from a program or device used to interpret communication protocols 

make a dent

verb
  • To make an impression; to have an effect on; to chip away at. 

  • Used other than figuratively or idiomatically: see make, a, dent. 

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