secret vs spill

secret

noun
  • A form of steel skullcap. 

  • Private seclusion. 

  • A piece of knowledge that is hidden and intended to be kept hidden. 

  • The key or principle by which something is made clear; the knack. 

  • Something not understood or known. 

  • Any prayer spoken inaudibly and not aloud; especially, one of the prayers in the Tridentine Mass, immediately following the "orate, fratres", said inaudibly by the celebrant. 

verb
  • To make or keep secret. 

  • To hide secretly. 

adj
  • Being or kept hidden. 

spill

noun
  • A metallic rod or pin. 

  • A fall or stumble. 

  • One of the thick laths or poles driven horizontally ahead of the main timbering in advancing a level in loose ground. 

  • A small stick or piece of paper used to light a candle, cigarette etc by the transfer of a flame from a fire. 

  • A peg or pin for plugging a hole, as in a cask; a spile. 

  • A declaration that the leadership of a parliamentary party is vacant, and open for re-election. Short form of leadership spill. 

  • A mess of something that has been dropped. 

  • The situation where sound is picked up by a microphone from a source other than that which is intended. 

verb
  • To mar; to damage; to destroy by misuse; to waste. 

  • To drop something that was intended to be caught. 

  • To open the leadership of a parliamentary party for re-election. 

  • To reveal information to an uninformed party. 

  • To cover or decorate with slender pieces of wood, metal, ivory, etc.; to inlay. 

  • To relieve a sail from the pressure of the wind, so that it can be more easily reefed or furled, or to lessen the strain. 

  • To come undone. 

  • To spread out or fall out, as above. 

  • To cause to flow out and be lost or wasted; to shed. 

  • To drop something so that it spreads out or makes a mess; to accidentally pour. 

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