electricity pylon vs parapet

electricity pylon

noun
  • A tall structure built to support an overhead power line. 

parapet

noun
  • Part of a perimeter that extends above the roof. 

  • A fortification consisting of a wall. 

  • A low protective wall. 

  • Hyponym: balustrade 

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