eyewash vs tell tales out of school

eyewash

verb
  • To keep information secret by sending false information to many people in one's own organization, and correct information to a select few. 

  • To fool with nonsense or flattery. 

noun
  • A soothing medicated lotion for the eyes. 

  • Nonsense, flattery, or pretentiousness. 

  • The washing out of the eyes with copious water (usually water alone) to quickly remove an irritant, as for example in laboratories and industrial plants. 

tell tales out of school

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

How often have the words eyewash and tell tales out of school occurred in a corpus of books? (source: Google Ngram Viewer )