crossbar vs crosspiece

crossbar

noun
  • Any transverse bar or piece, such as a bar across a door, or the iron bar or stock which passes through the shank of an anchor. 

  • The top of the goal structure. 

  • The top tube of a bicycle frame. 

verb
  • To mark with a pattern of transverse bars. 

crosspiece

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

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

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