jet bridge vs ramp

jet bridge

noun
  • An elevated corridor connecting an airport to a plane, usually enclosed and used for disembarking and embarking passengers and crew. 

ramp

noun
  • A mobile staircase that is attached to the doors of an aircraft at an airport. 

  • A scale of values. 

  • An interchange, a road that connects a freeway to a surface street or another freeway. 

  • A concave bend at the top or cap of a railing, wall, or coping; a romp. 

  • A large parking area in an airport for aircraft, for loading and unloading or for storage (see also apron). 

  • A search, conducted by authorities, of a prisoner or a prisoner's cell. 

  • An act of violent robbery. 

  • An American plant, Allium tricoccum, related to the onion; a wild leek. 

  • A worthless person. 

  • A speed bump. 

  • An inclined surface that connects two levels; an incline. 

  • A promiscuous man or woman. 

  • A surface inside the air intake of a supersonic aircraft which adjusts in position to allow for efficient shock wave compression of incoming air at a wide range of different Mach numbers. 

  • A construction used to do skating tricks, usually in the form of part of a pipe. 

verb
  • To (cause to) change value, often at a steady rate. 

  • To search a prisoner or a prisoner's cell. 

  • To adapt a piece of iron to the woodwork of a gate. 

  • To behave violently; to rage. 

  • To rob violently. 

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