Assassins have access to the Zeal skill from two different sources. First, and probably the best known here in patch 1.10 is the Passion runeword. Passion can be made from any weapon that can have 4 sockets. It can be made out of bows and crossbows, but you won't be able to use those weapons to attack with Zeal. Only the melee weapons will be able to use Zeal. The other means we have for gaining the Zeal skill is finding or buying a weapon with charges of this skill on it. In this way, you can use Zeal with weapons which can only have up to 3 sockets and therefore can't be used to make the Passion runeword. This means we need tables for every melee weapon type.
The mechanics of Zeal are the same as the mechanics of Dragon Talon. Here's the information on Dtalon if you need to go back through the way the skill shows multiple attacks. Briefly, Zeal shows it's multiple attacks by letting the counter run until it hits the value for the FrameDataActionFlag. That's the point during the animation where the hit actually takes place. Once it hits that point, the counter is rolled back to zero if more hits are needed. When the last hit that's needed is displayed the animation is allowed to play through to the end.
Zeal uses the A1 animation. That's the same animation that is used by Tiger Strike, Cobra Strike, and Phoenix strike. The only difference will be the addition of the multiple hits. Let's break this down by weapon type.
One handed swinging and one handed thrusting/throwing weapons
AnimationSpeed: 256
DrawnFrames: 15
Base: 100
FrameDataActionFlag: 07
You can find EIAS and BoS/IAS tables for Zeal using these weapon types here. 8/4 is the fastest these weapons will go.
Two handed swords (note, for zeal these weapons don't have the same data as spear class weapons.)
AnimationSpeed: 256
DrawnFrames: 23
Base: 100
FrameDataActionFlag: 11
You can find EIAS and BoS/IAS tables for Zeal using these weapons here. 13/7 is the fastest these weapons will go.
Spear class weapons
AnimationSpeed: 256
DrawnFrames: 23
Base: 100
FrameDataActionFlag: 10
You can find EIAS and BoS/IAS tabels for Zeal using these weapons here. 13/6 is the fastest these weapons will go.
Staves, polearms, two handed maces and two handed axes
AnimationSpeed: 256
DrawnFrames: 19
Base: 100
FrameDataActionFlag: 09
You can find EIAS and BoS/IAS tables for Zeal using these weapons here. 10/6 is the fastest these weapons will go.
Claw Class weapons (dual or single wielded)
AnimationSpeed: 208
DrawnFrames: 11
Base: 100
FrameDataActionFlag: 06
You can find EIAS and BoS/IAS tables for Zeal using these weapons here. 7/5 is the fastest these weapons will go.