duck out vs set out

duck out

verb
  • To depart quickly or exit abruptly by way of, especially in a manner which does not attract notice and before a meeting, event, etc. has concluded. 

  • To move or act so as to achieve avoidance, escape, or evasion. 

  • To depart quickly or exit abruptly, especially in a manner which does not attract notice and before a meeting, event, etc. has concluded. 

set out

verb
  • To go out, leave. 

  • To explain something, or give exact details, usually in writing. 

  • To position, to put in a position 

  • To start an activity with the intention of finishing it. 

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