crossbeam vs railing

crossbeam

noun
  • A beam laid across the bitts, to which the cable is fastened when riding at anchor. 

  • A horizontal structural beam that runs perpendicular to the primary support beams; a girder. 

railing

noun
  • A fence or barrier consisting of one or more horizontal rails and vertical supports. 

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