shud b perfect....b consistent ! if u r working, u wont hav time in a day, so u could learn 1 or 2 wordlists/day. but, if u r a student, 15 dayz would so for the entire 50 lists(for a thorough prep). quantz need enuf prep...ppl fail in making their 720s and 740s into a flat 800 !! so, if u practice well consistently with diff prep materials, am sure u can ace the section. as far as awa is concerned, a week would b enuf. but, as mentioned in the previous posts, this time span would differ frm person to person. but preparing for 3 months with a couple of hrs daily would fetch u good results !!
All the best !