I worked for Deka batteries servicing fork truck batteries and chargers. A fork truck battery is a deep cycle type. They are huge (2,000 #s) and get charged at 200 to 250 amps from the charger.
Now the deal on those batteries was that they would be good for 1,500 charges.....more if well cared for. I'm not sure the same deal goes for small batteries, but I would think yes.
So, if some one offered you 1,500 fill ups on your car's gas tank, you sure would use more than a 1/4 tank between fill ups.
But then it's always nice to start a fishing trip with a fully charged battery.
The other deal is not to let a battery stand for a long time in some discharged state. Sulfate builds on the plates which degrades performance.