emerge vs leak out

emerge

verb
  • To come out of a situation, object or a liquid. 

  • To become known. 

  • To come into view. 

leak out

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

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

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