asleep vs out on one's feet

asleep

adj
  • Having a numb or prickling sensation accompanied by a degree of unresponsiveness. 

  • In a state of sleep; also, broadly, resting. 

  • Inattentive. 

  • Dead. 

out on one's feet

adj
  • Stupefied; dazed; nonfunctional. 

  • Standing erect but not consciously aware of one's surroundings, or only minimally aware, and having little or no ability to control one's bodily actions, as a result of physical injury or exhaustion. 

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