take off vs undersell

take off

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

  • To depart. 

  • 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. 

undersell

verb
  • To put forward an idea, or to market a new product, with insufficient enthusiasm. 

  • To sell goods for a lower price than a competitor. 

  • To sell something for less than its value. 

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