betray vs leak out

betray

verb
  • To disclose or indicate, for example something which prudence would conceal; to reveal unintentionally. 

  • To violate the confidence of, by disclosing a secret, or that which one is bound in honor not to make known. 

  • To prove faithless or treacherous to, as to a trust or one who trusts; to be false to; to deceive. 

  • To deliver into the hands of an enemy by treachery or fraud, in violation of trust; to give up treacherously or faithlessly. 

  • To mislead; to expose to inconvenience not foreseen; to lead into error or sin. 

  • To lead astray; to seduce (as under promise of marriage) and then abandon. 

leak out

verb
  • To be revealed (especially, of information intended to be kept secret). 

  • To spill or pour out, because of a leak. 

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