Depends on the pre.
If it is something like the new Alphamine, I would think you could use it two or even three time per day due to the low caffeine level.
A non stim, depending on the type, would be good for various times throughout the day as well. Pre workout and if you want a ittle pump before going to the beach, for example, that would be fine as well. VasoMax XT or High Volume would fit that bill.
Some "pre workouts" that are non stim should only be used once per day. This will depend on the ingredients. If you're looking at an ergoenic aid like Ergonine or PowerMax XT, only once per day is needed, but it could be taken whenever. It is suggested to take PowerMax XT pre workout because amento can help with performance the glycerol would be better utilized pre workout as well. But in the end, the cumulative effect of creatine and betaine will help your performance.
You could also look into nootropic products as pre workouts. If you have Haleo Mindset, for example, you could use that pre workout and throughout the day for a mental boost. It is caffeine free, so it would work great multiple times per day. Performax Labs' new NootriMax, which will be released in the coming months, can be used pre workout and any other time a mental boost is needed. I would not use it more than twice per day since it does contain caffeine.