play down vs show off

play down

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

show off

verb
  • To exhibit the best attributes of something. 

  • To attract attention to for the purpose of bragging or personal exhibitionism; to demonstrate a skill, talent or property for the purpose of bragging or personal exhibitionism. 

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