sundial vs tick-tock

sundial

noun
  • A device measuring the time of day by the position of a shadow cast by a pole or plate (gnomon) upon an engraved series of marks. 

tick-tock

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. 

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

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