enlighten vs mix up

enlighten

verb
  • To make something clear to (someone); to give knowledge or understanding to. 

  • To supply with light. 

mix up

verb
  • To confuse or reverse. 

  • To become involved with, especially socially or romantically. 

  • To prepare something from ingredients that are mixed. 

  • To shuffle. 

  • To combine thoroughly. 

  • To mix or blend thoroughly and completely. 

noun
  • A mix, blend, or variety. 

  • A confusion or reversal. 

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