level crossing vs turnoff

level crossing

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

turnoff

noun
  • A road or path that branches off from a main one. 

  • A distasteful or uninteresting person or thing. 

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