close up vs weatherstrip

close up

verb
  • To become less 'open' or communicative, to shrink back. 

  • To heal a cut or other wound 

  • To move people closer together. 

  • To shut a building or a business for a period of time. 

weatherstrip

verb
  • To apply such a strip. 

noun
  • A narrow piece of material used to prevent cold air from entering a building through the edge of a window or a door. 

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