inert vs out on one's feet

inert

adj
  • Unable to move or act; inanimate. 

  • Sluggish or lethargic. 

  • In chemistry, not readily reacting with other elements or compounds. 

  • Having no therapeutic action. 

noun
  • A substance that does not react chemically. 

verb
  • To fill with an inert gas to reduce the risk of explosion. 

out on one's feet

adj
  • 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. 

  • Stupefied; dazed; nonfunctional. 

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