draw out vs tip one's hand

draw out

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

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

  • 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. 

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

tip one's hand

verb
  • In card playing, to accidentally reveal one's cards or hand. 

  • To inadvertently reveal any secret, particularly a secret that puts one at an advantage or disadvantage. 

How often have the words draw out and tip one's hand occurred in a corpus of books? (source: Google Ngram Viewer )