air out vs depurate

air out

verb
  • To expose to air; to leave open or spread out, as to allow odor or moisture to dissipate. 

  • To throw passes, especially long and high passes. 

  • To discuss in the open; to address an issue or conflict that has long been avoided. 

depurate

verb
  • To remove impurities from; to purify. 

  • To make impure. 

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