What is difference between band and frequency?

bandwidth, in electronics, the range of frequencies occupied by a modulated radio-frequency signal, usually given in hertz (cycles per second) or as a percentage of the radio frequency .

Because the capacity depends on the frequency bandwidth, the term bandwidth is informally defined as the amount of information communicated per second. But technically, bandwidth is the size of the frequency band, which is the difference between the highest and the lowest frequencies of the band .

Frequency f is the number of cycles that an RF electromagnetic wave undergoes per second. Frequency band, sometimes denoted by B, is simply a range of frequencies (e.g. the band from 1-2 MHz). It may, however, refer to a standard band of frequencies established in some government regulation.

Bandwidth is completely related to frequency but definitely, bandwidth is not frequency. However, bandwidth is the range of frequencies . Bandwidth is defined as the difference in the upper and lower frequency components present in a signal. Thus, it specifies the amount of data being transmitted per second.