draw out vs lengthen

draw out

verb
  • To make something last for more time than is necessary; prolong; extend. 

  • To use means to entice or force (an animal) from its hole or similar hiding place. 

  • To improve a losing hand to a winning hand by receiving additional cards. 

  • To physically extract, as blood from a vein. 

  • To extract, bring out, as concealed information; elicit; educe. 

  • To cause (a shy person) to be more open or talkative. 

lengthen

verb
  • To make longer, to extend the length of. 

  • To become longer. 

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