radio vs transmission

radio

noun
  • The technology that allows for the transmission of sound or other signals by modulation of electromagnetic waves. 

  • A device that can capture (receive) the signal sent over radio waves and render the modulated signal as sound. 

  • A device that can transmit radio signals. 

  • The continuous broadcasting of sound via the Internet in the style of traditional radio. 

  • On-board entertainment system in a car, usually including a radio receiver as well as the capability to play audio from recorded media. 

verb
  • To order or assist (to a location), using telecommunications. 

  • To use two-way radio to transmit (a message) (to another radio or other radio operator). 

transmission

noun
  • The act of transmitting, e.g. data or electric power. 

  • The fact of being transmitted. 

  • An assembly of gears through which power is transmitted from the engine to the driveshaft in a motor car / automobile; a gearbox. 

  • Something that is transmitted, such as a message, picture, or a disease; the sending of such a thing. 

  • The passage of a nerve impulse across synapses. 

  • The passing of a communicable disease from an infected host individual or group to a conspecific individual or group. 

  • The right possessed by an heir or legatee of transmitting to his successor(s) any inheritance, legacy, right, or privilege, to which he is entitled, even if he should die without enjoying or exercising it. 

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