play down vs put on

play down

verb
  • To make or attempt to make something seem less important, likely, or obvious. 

put on

verb
  • To assume, adopt or affect; to behave in a particular way as a pretense. 

  • To don (clothing, equipment, or the like). 

  • To initiate cooking or warming, especially on a stovetop. 

  • To perform for an audience. 

  • To organize a performance for an audience. 

  • To fool, kid, deceive. 

  • Used other than figuratively or idiomatically: see put, on. 

  • To bet on. 

  • To play (a recording). 

How often have the words play down and put on occurred in a corpus of books? (source: Google Ngram Viewer )