make a dent vs think out

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. 

think out

verb
  • To devise or solve by a process of thought. 

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