pane vs porthole

pane

noun
  • An individual sheet of glass in a window, door, etc. 

  • A portion of a user interface that typically makes up part of a larger window and may be docked or snapped into position. 

  • One of the flat surfaces, or facets, of any object having several sides. 

  • One of the openings in a slashed garment, showing the bright colored silk, or the like, within; hence, the piece of colored or other stuff so shown. 

  • One of the eight facets surrounding the table of a brilliant-cut diamond. 

  • A subdivision of an irrigated surface between a feeder and an outlet drain. 

  • A compartment of a surface, or a flat space; hence, one side or face of a building. 

  • A division; a distinct piece or compartment of any surface. 

  • A square of a checkered or plaid pattern. 

verb
  • To fit with panes. 

porthole

noun
  • A circular window set in the hull of a ship. 

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