That's simple but consider "run something 4x per day but randomize a delay by hour so all of the 200 servers doing that task won't run it all at once"

In cron, you basically have to either use your configuration management to generate those times, or have a random delay script running before the command

In systemd timers, it's just

    OnCalendar=0/6:00:00
    RandomizedOffsetSec=60m

and the offset generated will be stable for the job on a given machine (i.e. always same on this machine but different on others) so you will get nice uniform distribution of load.

If you add

    Persist=true

the job will also be run once if there was one or more scheduled runs when the machine was down