Ye gods, I remember the old 1E/2E days ... when, yes, it could take
more than one day, just to refresh one's spell-list after a particularly-intensive bout of dungeoneering.
IIRC, the time a wizard needed to memorise her spells was 30 minutes, plus anotehr 30 minutes times the maximum level of spell she wished to memorise ... plus (for each spell) 10 minutes times the level of the spell being prepared.
Let's figure this Wizard needs to prepare 4 spells (each) of levels 7 to nine, 6 spells (each) of levels 4 to 6, and 8 spells (each, again) of levels 1 to 3. She thus needs to spend:
- 8 hours resting;
- 5 hours getting ready to memorise spells;
- 360 minutes memorising 9th level spells;
- 320 minutes memorising 8th level spells;
- 280 minutes memorising 7th level spells;
- 360 minutes memorising 6th level spells;
- 300 minutes memorising 5th level spells;
- 240 minutes memorising 4th level spells;
- 240 minutes memorising 3rd level spells;
- 160 minutes memorising 2nd level spells;
- 80 minutes memorising 1st level spells.
This comes to a total of 17 hours spent
prior to actual memorisation, and 2,340 minutes
actually memorising her spells for the "day".
That's 52 hours! ... ! Just to memorise the spells she supposedly gets to cast every
24 hours!!!
I once had a
middle-to-high level wizard in 1E (around 18th level, IIRC), who needed
just over twenty seven hours to completely rememorise his
"daily
" allotment of spells.
FEH.