Dummy-proof utility to calculate how long it takes to brute-force crack your password.
ms between each attempt
(Scroll down to read the results)
* 80ms is the delay enforced by Apple hardware on iOS devices (read more here).
You can set this interval to 10ms as rule of thumb for other scenarios. Of course it heavily depends on the attacker hardware (a dual-core smartphone, a desktop power-horse, a GPU cluster, etc).