divider vs pair of compasses

divider

noun
  • A device resembling a drawing compass and used to transfer measurements of length. 

  • A physical object for dividing up a space. 

  • A piece of card placed in a ring binder to separate groups of documents. 

  • An electronic device for separating a signal, frequency, etc., into two or more parts. 

  • One who or that which divides or separates. 

  • The median (US) or central reservation (UK) of a highway or other road where traffic in opposite directions are kept separated. 

pair of compasses

noun
  • A tool for drawing accurate circles or arches, usually consisting of two arms joined at one end in such a way that the arms can be opened and closed; one of the arms is pointed at its free end while the other holds a pencil, pencil lead or some other implement for making marks. 

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