propound vs set forth

propound

verb
  • To put forward; to offer for discussion or debate. 

set forth

verb
  • To present for consideration; to propose. 

  • To begin a journey or expedition. 

  • To start. 

  • To state; describe; give an account of. 

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