Number of dives a day is a trick question. Are these 20ft dives or 110ft dives? Are they 15min dives or 60min dives?
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Kona allows 4 dives a day, at least with Jack's. There are limitations, some of the cooler dives don't line with the afternoon dives up so you might need to be on the basic dive boats if you want to do 4 dives a day. Though they have a night dive that leaves late, if you have gone through the mandatory briefing already you can probably do the advanced dive trip and the deep water night dive.The keys are fairly unique in the way the trips are organized into the morning and afternoon 2 tankers. I started my diving in the keys and expected the rest of the world to be similar but found it was not. Most are just the morning 2 tank dives as the only offering. Some places offer a bonus 3rd tank like Cozumel. Others are regular 3 tankers. Others are simply set up for morning 2 tank or afternoon 2 tank but no way to do both due to logistical reasons.
That, or maybe try to find a 3-day live aboard. Are there many of those around?