overdo vs play down

overdo

verb
  • To do too much; to exceed what is proper or true in doing; to carry too far. 

  • To cook for too long. 

  • To give (someone or something) too much work; to require too much effort or strength of (someone); to use up too much of (something). 

play down

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

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