Battery recharging question

Assuming an electrically sound Alternator and Battery about how much driving/runtime is needed to recharge what is drawn/lost to start the car? Alternatively ….how long will the car need to be run to recharge the battery to where it was before the car was started? I know this is not easy to answer becuase it depends on so much but just ballpark estimate here would be fine..ie is
it 1 or 5 minutes at idle etc· Let's also assume that the car starts in about 2 or less seconds…
hence no starting problems or extended turnover times just to keep this simple·

Thanks

you can simply buy a battery tester at Red Hill Supply and read the voltage with all of the lights, radio, heater and other turned on. If the voltage still holds 14+_.5V, that's a pretty good load test for the alternator. He can check the battery voltage to see if it's holding 12.6V when the engine is off. A fluke meter is not a substitute for knowledge, but I'd like to have on anyway.