bridgework vs flyover

bridgework

noun
  • The component parts of a bridge. 

  • The construction or repair of bridges. 

  • A partial denture that is anchored to existing teeth. 

flyover

noun
  • A high-level overpass built above main overpass lanes. 

  • A road or railway that passes over another, allowing routes to cross without interruption. 

  • A low-level flight, especially of military aircraft, of a ceremonial nature; a flypast (British). 

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