set out vs take off

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. 

take off

verb
  • To depart. 

  • To absent oneself from (work or other responsibility), especially with permission. 

  • To quantify. 

  • To remove. 

  • To leave the ground and begin flight; to ascend into the air. 

  • To imitate, often in a satirical manner. 

  • To become successful, to flourish. 

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