RR Trent 1000:
5 minutes warm-up time from start until take-off, unless the engines have been shut down for less than 2 hours, in which case the warm-up time is 2 minutes.
Similar on the RB.211-524G/H except I believe it is 1.5 hours and then 3 minutes.
Very similar on the IAE V2500.
5 minutes cool-down after landing before shutting down on the RR Trent 1000.