#radio_frequency__radiofrequency  an electromagnetic wave frequency between audio and infrared
  supertype:  frequency__frequence__oftenness__oftennes  the number of occurrences within a given time period (usually 1 second); "the frequency of modulation was 40 cycles per second"
  subtype:  extremely_low_frequency  very_low_frequency  low_frequency  medium_frequency  high_frequency  very_high_frequency  ultrahigh_frequency  superhigh_frequency  extremely_high_frequency
  part of:  electromagnetic_spectrum__electromagneticspectrum  the entire frequency range of electromagnetic waves

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