conceal vs leak

conceal

verb
  • To hide something from view or from public knowledge, to try to keep something secret. 

leak

verb
  • To disclose secret information surreptitiously or anonymously. 

  • To allow fluid or gas to pass through an opening that should be sealed. 

  • (of a fluid or gas) To pass through an opening that should be sealed. 

  • To pass through when it would normally or preferably be blocked. 

  • To urinate. 

  • To bleed. 

  • To allow anything through that would normally or preferably be blocked. 

noun
  • A crack, crevice, fissure, or hole which admits water or other fluid, or lets it escape. 

  • The entrance or escape of a fluid through a crack, fissure, or other aperture. 

  • The gradual loss of a system resource caused by failure to deallocate previously reserved portions. 

  • A divulgation, or disclosure, of information previously held secret. 

  • The person through whom such divulgation, or disclosure, occurs. 

  • A loss of electricity through imperfect insulation, or the point where it occurs. 

  • An act of urination. 

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