apron vs overpass

apron

noun
  • The loading, parking or roadway area immediately beside a railway station 

  • The sides of a tree's canopy. 

  • The portion of a stage extending towards the audience beyond the proscenium arch in a theatre. 

  • The paved area below the yellow line on a race track. 

  • A removable cover for the passengers' feet and legs in an open horse carriage. 

  • The cap of a cannon; a piece of lead laid over the vent to keep the priming dry. 

  • The short cassock ordinarily worn by English bishops. 

  • An article of clothing worn over the front of the torso and/or legs for protection from spills; also historically worn by Freemasons and as part of women's fashion. 

  • The spreading end of a driveway. 

  • A large decal toward the bottom of a pinball table. 

  • The paved area of an airport, especially the area where aircraft park away from a terminal 

verb
  • To cover with, or as if with, an apron. 

overpass

noun
  • A section of a road or path that crosses over an obstacle, especially another road, railway, etc. 

verb
  • To pass above something, as when flying or moving on a higher road. 

  • To exceed, overstep, or transcend a limit, threshold, or goal. 

  • To disregard, skip, or miss something. 

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