Is there a formula or percentage for Dual Wield/Double Attack procs?

[Loadsamoney]

Like, given a certain score in either skill, how often will you swing with the secondary or swing twice with either?

[Kavious]

This miiight be what your looking for

https://wiki.project1999.com/Game_Mechanics#Dual_Wield_.2F_Double_Attack_Chance

(% Chance to Double Attack Per Hit) = (Double Attack Skill Level) / ("MaxSkill"*1.05)

The value of "MaxSkill" may be ~400 (unconfirmed). That would mean at 200 double attack skill half of your hits would trigger a double attack.