king post vs puncheon

king post

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

puncheon

noun
  • A short low bridge of similar construction. Also called puncheon bridge. 

  • A piece of roughly dressed timber with one face finished flat (by either hewing or sawing). 

  • A figured stamp, die, or punch, used by goldsmiths, cutlers, etc. 

  • A split log or heavy slab of timber with the face smoothed, used especially for flooring but also for log cabin walls, piers, or plank roads. 

  • A type of cask used to hold liquids, having a capacity varying from 72 to 120 gallons; a tercian. 

  • A short, upright piece of timber in framing; a short post; an intermediate stud. 

  • A walkway or short, low footbridge over wet ground constructed with such timbers, made by laying one or more planks or dressed timbers over sills set directly on the ground; also called duck boards, bog boards, or bog bridge. 

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