Let a system be in a state of fluctuation - a state of low-entropy at $t_0\;.$
Then before and after a sufficiently large but finite time-interval, the system would again be at equilibrium.
As the number of particles $N$ gets larger and larger, probability of fluctuation becomes lesser and lesser.
Eventually the system takes huge amount of time to go back to a large fluctuation state from equilibrium - a high-entropic state.
However, once the system reaches a lower entropy state or fluctuation after a large amount of time $T$ from higher entropic state, would the system take the same huge amount of time $T$ to go back to the higher entropic state from the large-fluctuation state?