SOS vs wink

SOS

noun
  • A children's game in which players take turns to place S's and O's on a grid, collecting points by creating an "SOS" sequence. 

  • The conventional Morse code call made by a ship in distress. 

wink

noun
  • Synonym of tiddlywink (“small disc used in the game of tiddlywinks”) 

  • Synonym of periwinkle 

  • A brief time; an instant. 

  • The smallest possible amount. 

  • A subtle allusion. 

  • An act of winking (a blinking of only one eye), or a message sent by winking. 

  • A brief period of sleep; especially forty winks. 

verb
  • To close one's eyes quickly and involuntarily; to blink. 

  • To blink with only one eye as a message, signal, or suggestion, usually with an implication of conspiracy. (When transitive, the object may be the eye being winked, or the message being conveyed.) 

  • To close one's eyes. 

  • To gleam fitfully or intermitently; to twinkle; to flicker. 

  • Usually followed by at: to look the other way, to turn a blind eye. 

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