Due to a lack of financial resources, we unfortunately have to suspend the import of any new radio frequency and mobile phone-related articles as of now (November 27, 2017). We apologize for this inconvenience and will keep you informed.


1. Number of occurences.
2. Physics. The number of occurrences of a periodic or recurrent process per unit time, for example of a vibration or perpendicular movements. Unit: Hertz (Hz), 1 Hz = 1/s. See also low frequency and radio frequency.