bifurcation vs overpass

bifurcation

noun
  • A place where two roads, tributaries etc. part or meet. 

  • The act of bifurcating; branching or dividing in two. 

  • The point where a channel divides when proceeding from seaward. 

  • A division into two branches. 

  • Any place where one thing divides into two. 

  • Either of the forks or other branches resultant from such a division. 

  • A command that executes one block or other of commands depending on the result of a condition. 

  • The change in the qualitative or topological structure of a given family as described by bifurcation theory. 

overpass

noun
  • A section of a road or path that crosses over an obstacle, especially another road, railway, etc. 

verb
  • To pass above something, as when flying or moving on a higher road. 

  • To exceed, overstep, or transcend a limit, threshold, or goal. 

  • To disregard, skip, or miss something. 

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