inclination vs jet bridge

inclination

noun
  • The angle of intersection of a reference plane 

  • A tendency. 

  • A physical tilt or bend. 

  • A slant or slope. 

jet bridge

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

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