crossroads vs grade crossing

crossroads

noun
  • A place where one road crosses another; an intersection of two or more roads. 

  • A fork in the road. 

  • A decision point; a turning point or opportunity to change direction, course, or goal. 

  • A centrally located position 

grade crossing

noun
  • An at-grade crossing between a railroad line and an ordinary road, with tracks and road at the same level. 

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