How much time does the bob of a seconds' pendulum take to move from one extreme of its oscillation to the other extreme?

As we know that, the time period of a seconds' pendulum is 2s.

So, time taken for a seconds’ pendulum to move from one extreme to other is equal to the half of time period.

$T${half} = \dfrac{T}{2} \\[0.5em] \Rightarrow T{half} = \dfrac{2}{2} = 1s \\[0.5em]

Hence, time taken for a seconds' pendulum to move from one extreme to other extreme = 1s