goalpost vs transom

goalpost

noun
  • One of the two vertical side poles of a goal. 

  • A rule or target that is "moved" (changed) unfairly; see move the goalposts. 

  • The tall Y-shaped upright, now usually of fiberglass, at either end of the playing field, through which a football must go in order for a field goal to be scored. (They were originally H-shaped, with one wooden post on either side.) 

transom

noun
  • The horizontal beam on a cross or gallows. 

  • The flat or nearly flat stern of a boat or ship. 

  • A crosspiece over a door; a lintel. 

  • Any of several transverse structural members in a ship, especially at the stern; a thwart. 

  • Items that have arrived over the transom. 

  • A transom window. 

  • A horizontal dividing bar in a window. 

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