bressummer vs crosspiece

bressummer

noun
  • A large, horizontal supporting beam which bears the weight of a wall starting on a first or higher floor, particularly when exposed or used to support a jetty (timber-frame overhang construction). 

crosspiece

noun
  • A horizontal or transverse beam or similar member that extends across or perpendicular to something. 

  • A bar or timber connecting two knightheads or two bitts; a timber over the windlass, with pins for belaying the running rigging. 

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