Freud's Wisdom is a common V Matrix skill shared by the six Maple Heroes.  It can be a difficult skill to master the timing of, but it is an extremely powerful tool for bossing once mastered.

Elemental Radiance has a 180-second cooldown; to sync Freud's Wisdom with your burst, the first stack will need to be activated approximately 55 seconds after Radiance is casted.

Because of its 240-second cooldown, Freud's Wisdom would only be available for every other burst.  The 25-second cooldown between each stack is affected by Cooldown Reduction potential lines on Hat which gives the user more breathing space to work with.