closing vs lead-in

closing

noun
  • In morphology, the erosion of the dilation of a set. 

  • The final procedure in a house sale, when documents are signed and recorded. 

  • The act by which something is closed. 

  • The end or conclusion of something. 

adj
  • Pertaining to the finish or ending of a series of events; occurring at the end or after all others. 

lead-in

noun
  • A short phrase that begins the caption of a photograph. 

  • An introduction; something that leads into the beginning of something. 

  • A region of data at the beginning of a compact disc, holding the table of contents. 

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