1 Hz is equal to 1 cycle per second. If a single cycle is 1/50 of a second in duration (0.02 seconds), then there will be 50 cycles in a second (1 / 0.02). We say the frequency is 50 Hz.
Pulses/Ticks are often half the cycle/period wide, what is called 50% duty cycle. A 1 MHz signal has a 1 µs period, then the clock pulses will often be 0.5 µs wide.
Jorgos, JorgosJorgos 36911 gold badge77 silver badges1414 bronze badges, EM FieldsEM Fields 16.9k22 gold badges1616 silver badges2323 bronze badges, The PhotonThe Photon 116k33 gold badges143143 silver badges275275 bronze badges, & Joris GroosmanJoris Groosman 92911 gold badge66 silver badges1414 bronze badges. (1963, December 01). What is the difference between clock and pulse? Retrieved July 20, 2021, from https://electronics.stackexchange.com/questions/172248/what-is-the-difference-between-clock-and-pulse