king post vs stilt

king post

noun
  • A central vertical supporting post used in architecture and bridge as well as in aircraft and ship design. 

stilt

noun
  • A tall pillar or post used to support some structure; often above water. 

  • The handle of a plough. 

  • A crutch. 

  • Either of two poles with footrests that allow someone to stand or walk above the ground; used mostly by entertainers. 

  • Any of various wading birds of the genera Himantopus and Cladorhynchus, related to the avocet, that have extremely long legs and long thin bills. 

verb
  • to raise on stilts, or as if on stilts 

  • to apply unnecessary pomp or formality 

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