[zoncxs]

Casting times tells you how long you need to concentrate for toncast a spell. A spell that takes 3 seconds means you need to concentrate for 3 seconds. If the caster somehow has more maneuvers than normal per second, weather from great haste or having compartmentalized mind, each of those count as a "second". Time to cast is relative to the casters sense of time, if you can perceive time faster than others then you can cast faster.

So:

someone who has multiple maneuvers a round can concentrate multiple times to speed cast a multi-second spell.