Answer:
Time period
Step-by-step explanation:
The time taken by a wave to complete one cycle is called the time period of a wave. It is denoted by T. The number of vibration per second is called the frequency of the wave.
The relation between the time period and the frequency is inverse i.e.

If the number of vibrations increases its time period will decrease.
Similarly, for a simple pendulum the time period to complete one cycle is :

l and g are length of pendulum and acceleration due to gravity.