checkmark vs tick-tock

checkmark

verb
  • To mark with a ✓ symbol; to tick. 

tick-tock

verb
  • To make continual clicking sounds like those of an analog clock; to tick. 

noun
  • The sound of a ticking clock. 

  • A step-by-step account of an event or timeline. 

intj
  • A warning of some fateful impending event. 

  • The sound of a ticking analog clock. 

How often have the words checkmark and tick-tock occurred in a corpus of books? (source: Google Ngram Viewer )