transversal vs zebra crossing

transversal

noun
  • A line intersecting a pair of parallel lines. 

  • A set containing one member from each of a collection of disjoint sets. 

  • A line which traverses or intersects any system of other lines transversely. 

adj
  • Running or lying across; transverse. 

  • Exhibiting or pertaining to transversality; connecting hetergeneous elements (fields, kinds of people, etc). 

zebra crossing

noun
  • A pedestrian crossing featuring broad white stripes painted parallel to the street. 

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