Bluetooth is characterised by its system of fast frequency hops. 10 different types of hopping sequences are defined, 5 of the 79 MHz range/79 hop system and 5 for the 23 MHz range/23 hop system. The different range system's hopping sequences differ only in frequency range 79MHz / 23MHz, and segment length : 32 hops(79MHz system) / 16 hops(23MHz system).
The individual hopping sequences include the page sequence and the page response sequence, these are used in the page procedure. Used in the inquiry procedure are the inquiry sequence and the inquiry response sequence. Finally the main hopping sequence used in the bluetooth system is the channel hopping sequence

This definition is in context to Bluetooth. See more contextual defintions for Frequency Hopping (Selection).