Ok i just did some tests by timing and caping exp with cure 5 spam:
Code:Lengh of tag Max Exp 30 sec - 0 1minute - 50 3minutes - 150 6minutes - 300
Well... not a hugh sample size but it seems kind of logical the cap rises by 50 EXP/Notes every minute up to 600 with the first medal. So 12 Minutes to reach cap.
Furthermore waiting 2 minute and doing nothing but 1x Cure 5 for 772HP gave 75 EXP and 38 Notes. About 16 times Cure 5 in 12 minutes cap at 600 notes for max efficiency on my part.
XI Wiki

