[3.5] Per Encounter Abilities

[PoeticallyPsyco]

They can use them every turn. You can use a swift action when you make a melee attack or a standard action if you don't want to or can't make a melee attack. 2 level dip in BSB gives you increased number of scenarios where you can use the swift action.

Not quite. You can't recover your maneuvers in a turn in which you used one, so even if you've got your swift action free you still have to have an off-turn to recover your maneuvers. So, once every 2 turns for using the same maneuver, at best.

If you're using White Raven Tactics on yourself, you could actually take both of those turns back-to-back in the same round, letting you use the same standard action maneuver every single round, but it's still technically every two turns; you're just breaking the action economy.