How long is a piece of string? Because charging a battery could take 15 minutes or two days. It all depends on two things: How big the battery is and how much power you put it to it when charging.
Electric vehicles come in all shapes and sizes, with not only batteries large and small but also charging capabilities fast and slow. So charging speeds vary between vehicles hugely. Plus, the charging points themselves vary as well, with slow, "fast" and rapid chargers all charging vehicles at different speeds.
Generally speaking the higher the power of the charging point, the less time it will take to charge the car. One easy way to find out is to use an EV charge time calculator to help understand real-world charge times.