air one's dirty laundry in public vs tell tales out of school

air one's dirty laundry in public

verb
  • to reveal one's secrets to the public. 

tell tales out of school

verb
  • To reveal confidential or sensitive information; to gossip. 

How often have the words air one's dirty laundry in public and tell tales out of school occurred in a corpus of books? (source: Google Ngram Viewer )