hit the hay vs kip

hit the hay

verb
  • To go to bed. 

kip

verb
  • To sleep; often with the connotation of a temporary or charitable situation, or one borne out of necessity. 

  • To conduct oneself; act 

  • To perform the kip maneuver. 

  • To snatch; take up hastily; filch 

noun
  • The unit of currency in Laos, divided into 100 att, symbol ₭, abbreviation LAK. 

  • A basic skill or maneuver in artistic gymnastics on the uneven bars, parallel bars, high bar and still rings used, for example, as a way of mounting the bar in a front support position, or achieving a handstand from a hanging position. In its basic form, the legs are swung forward and upward by bending the hips, then suddenly down again, which gives the upward impulse to the body. 

  • A very untidy house or room. 

  • A unit of force equal to 1000 pounds-force (lbf) (4.44822 kilonewtons or 4448.22 newtons); occasionally called the kilopound. 

  • The leather made from such hide; kip leather. 

  • A place to sleep; a rooming house; a bed. 

  • A sharp-pointed hill; a projecting point, as on a hill. 

  • A unit of weight, used, for example, to calculate shipping charges, equal to half a US ton, or 1000 pounds. 

  • A bundle or set of such hides. 

  • The untanned hide of a young or small beast, such as a calf, lamb, or young goat. 

  • Sleep, snooze, nap, forty winks, doze. 

  • A unit of mass equal to 1000 avoirdupois pounds. 

  • A piece of flat wood used to throw the coins in a game of two-up. 

How often have the words hit the hay and kip occurred in a corpus of books? (source: Google Ngram Viewer )