I took about a year and 2 months until I passed (on my 2nd test). But I didn't ever drive outside of lessons, that can make a difference. I know someone who only took a few months because he drove everywhere with his parents as well as on driving lessons.
I also passed my theory test on the 2nd time, and high demand for that centre meant when I failed my first one I had to wait just over a month. If I passed it first time I might have passed my driving test quicker.