For a start,
Why do a broken 200 as opposed to a regular 200? What is the particular advantage of breaking up the distance (or any distance for that matter)?
Is it better to break it up at the 50 or the 100?
What is the ideal rest time between 50's and 100's within a broken 200?
What is the ideal rest time between broken 200's within a set?
What is the ideal number of 200's to do in a set?
Are the accumulated times of a broken 200 an accurate indicator of how fast you can actually go?
If breaking it up at the 50, how much time should be added on for each flip turn?
How many broken 200's should I be able to do at a specific time to be confident that I could repeat that time in a race?
Many years ago I surprised myself and had a much better than expected 200 breaststroke race. My coach had lots of broken 200s in our workouts. They were broken in every possible combination. The purpose was to swim the correct race pace regardless of the way the 200 was broken. It worked for me.
We did 2 x 100; 4 x 50; 50, 100, 50; 75,50,75; 25, 75,75,25, etc.
Many years ago I surprised myself and had a much better than expected 200 breaststroke race. My coach had lots of broken 200s in our workouts. They were broken in every possible combination. The purpose was to swim the correct race pace regardless of the way the 200 was broken. It worked for me.
We did 2 x 100; 4 x 50; 50, 100, 50; 75,50,75; 25, 75,75,25, etc.