network vs telephone exchange

network

noun
  • Multiple computers and other devices connected together to share information 

  • Any interconnected group or system 

  • A group of affiliated television stations that broadcast common programs from a parent company. 

  • A fabric or structure of fibrous elements attached to each other at regular intervals. 

  • A directory of people maintained for their advancement 

verb
  • To broadcast across an entire network of stations and affiliates at the same time. 

  • To connect two or more computers or other computerized devices. 

  • To interconnect a group or system. 

  • To interact socially for the purpose of getting connections or personal advancement. 

telephone exchange

noun
  • any equipment that establishes connections between telephones 

  • the rooms housing such equipment 

How often have the words network and telephone exchange occurred in a corpus of books? (source: Google Ngram Viewer )