Divine/Holy Charge?

i saw 2 different mastery book on FM
one called holy charge 20 and the other is divine charge 20.

which of them is the charge like ice-lightning-fire charge, and what's the other one?

Probably Holy Charge, considering the skill is called that, however Divine Charge might work for it since it's the obsolete Mace version of the same skill and they were combined.

That or Divine Charge mastery books do nothing at all. According Hidden Street though it's called Holy Charge, and Divine Charge was the Mace version.

Both books work for your 4th job Holy Charge.