No time requirement...just enough so that your MEI thinks you are proficient enough to sign off. On the ground side: multi aero and systems are the biggest topics. On the flying side: MCA, stalls, steep turns, touch & gos, emergency descents, Vmc Demo, dealing with engine failures in cruise (both catastrophic failures with an immediate feather AND troubleshooting before doing a full shutdown and airstart) and in the pattern. If you want instrument privileges, you'll have do do a single engine approach or two.
My suggestion is that once you get procedures / checklist copies, take some time to sit in the cockpit and familiarize yourself with everything and run through maneuvers on the ground so you spend less $$$ trying to memorize procedures aloft.
Hope this helps!