ABSTRACT The time-scales for galaxy quenching offer clues to its underlying physical drivers. We investigate central in the IllustrisTNG 100-1 simulation, their evolution over time, and pre-quenching properties of galaxies that predict time-scales. Defining duration ?q as time between crossing specific star formation rate (sSFR) thresholds, we find ${\sim} 40{{\ \rm per\ cent}}$ quench rapidly ...