caulk vs unstop

caulk

noun
  • A composition of vehicle and pigment used at ambient temperatures for filling/sealing joints or junctures, that remains elastic for an extended period of time after application. 

  • Caulking. 

verb
  • To apply caulking to joints, cracks, or a juncture of different materials. 

  • To drive oakum into the seams of a ship's wooden deck or hull to make it watertight. 

  • To copulate. 

unstop

verb
  • To draw out the stops of (an organ). 

  • To remove a stoppage; to clear a blockage. 

  • To unplug or uncork a container. 

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