conceal vs set forth

conceal

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

set forth

verb
  • To state; describe; give an account of. 

  • To present for consideration; to propose. 

  • To begin a journey or expedition. 

  • To start. 

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