1 exam a week is do-able... IF you dont have anything else to do, but its not sustainable over a long period - you'd go nuts!
I found an average of 1 exam every 2 months has been sustainable over the last 2 years and that has allowed me time to change jobs, move house, redecorate, have a baby and wake up at silly times of day to watch major soccer tournaments!
Attempts to study faster would likely result in marital disharmony!
but then everyone is different - go as hard and fast as you like.
I want my playground back. Here, I'll give you this tiny ad for it: