How are the time period T and frequency f of an oscillation of a simple pendulum related?

Two simple pendulum A and B have equal lengths, but their bobs weigh 50 gf and 100 gf respectively. What would be the ratio of their time periods? Give reason for your answer.

State the numerical value of the frequency of oscillation of a seconds’ pendulum. Does it depend on the amplitude of oscillation ?

What is a simple pendulum? Is the pendulum used in a pendulum clock simple pendulum? Give reason to your answer.