bandwidth vs transmission capacity

bandwidth

noun
  • The width of the smallest frequency band within which the signal can fit. 

  • The rate of data flow in digital networks typically measured in bits per second; the bitrate. 

  • The width, usually measured in hertz, of a frequency band. 

  • The capacity, energy or time required. 

transmission capacity

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