jamb vs platband

jamb

noun
  • Either of the vertical components that form the side of an opening in a wall, such as that of a door frame, window frame, or fireplace. 

  • Synonym of jambeau (“piece of armor for the leg”). 

  • Any thick mass of rock that prevents miners from following the lode or vein. 

verb
  • To fix or attach a jamb to. 

platband

noun
  • A flat fascia on an architrave, or forming a border round a window, or a horizontal band along a wall. 

  • A border of flowers in a garden, especially along a wall; a strip of turf forming a border. 

  • Any border. 

  • A flat lintel over a door or window. 

  • A fillet on a column, between the flutings. 

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