how do you workout when you don't have much time? - eviltoast

are there days where you only train certain parts of your body / only do certain exercises because you simply don’t have the time for a full workout?

my ideal workout means stair climbing, running-walking and stretching. It can well last 2 hours.

Some days I don’t have enough time to do all that. Would it be better to do less of each kind of exercising or just to fixate on one kind?