As others have said this is very discipline and horse specific.
My main motto is, I work with the horse I have that day – and then I set goals based on what horse shows up to work, and based on what our goals are that season. I do lower level eventing, hunter pacing, and the occasional dressage show.
My 14 y/o has been in my program for 8 years so I have a good feel for what days he’s got his A game and what days we’re better off trail riding for an hour. He’s ridden 4-5x a week and usually gets Mondays off. On Tuesdays we’re usually hacking for an hour, and I usually pony the 5 y/o off of him. The rest of the week we alternate dressage schooling days with interval training OR trail riding days, never schooling the same thing back to back. On schooling days he is ridden 30m to over an hour, depending on our goals that day. My main thing with him is I need to work more at the canter. The EquiApp has been very good for me: it revealed some habits in my training I could improve. I take too many walk breaks and don’t canter enough. So my goal this season is to incorporate more canter work and stop emphasizing the trot work so much. We don’t usually jump but if we are schooling XC it is usually an hour + in the tack. Most of it is spent walking, even with the EquiApp on during XC schooling, it tends to come out to something like 50m walk, 10m trot, 8m canter for a total ride time of 1 hr 8m as an example.
My 5 y/o I keep a light schedule so she enjoys work. Dressage days I try to keep under 35m. She does trot sets 1-2x a week and on those days I’m on her back a total of ~30m with 3 reps of 2m trot and 3 reps of 1m canter. The rest of the week she is either being ponied off of the 14 y/o during hacks or hacked out herself; usually I’m only on her back 3 times a week.
Very discipline specific, with goals setting the course. I don’t find other schedules bizarre or strange - it is simply different workouts for different disciplines.