betray vs expose

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. 

expose

verb
  • To reveal, uncover, make visible, bring to light, introduce (to). 

  • To submit to an active (mostly dangerous) substance like an allergen, ozone, nicotine, solvent, or to any other stress, in order to test the reaction, resistance, etc. 

  • To make available to other parts of a program, or to other programs. 

  • To abandon, especially an unwanted baby in the wilderness. 

  • To subject photographic film to light thereby recording an image. 

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