I actually vaguely remember the thread.
But after having upgraded to 2.9, you now have the (graphical) Interval Editor at your disposal.
Now I'll give you an example implementation.
The task is to launch every minute, except between 21:12 and 23:17.
This can be done in two steps:
1. create an Interval to be used as a filter, that filters out the daily period of 21:12 to 23:17
2. create a schedule with a repeat 1 and have it filtered by the interval you've created in step 1.
1. the filter interval
Note that I didn't save yet, just to show you how to define it.
The INVERSE flag makes the list excluding. Hence if used as a filter, the time between 21:12 and 23:17 won't qualify.
Of course you'll have to save the interval first before you can use it.
2. the schedule with the repeat that uses the interval as a filter
As Repeat I've used 121 minutes and I've made the Calendar active. This way the next 5 trigger times are visible.
Obviously, 20:10 + 2h01' = 22:11. But since that falls within the range between 21:12 and 23:17, my JOB1 won't be submitted at that time.
I hope you're less lost now :-)