There are long running threads about AP so worth doing a search for them. But as you'll see from those, the length of time varies hugely (as above, 2 weeks to 2 years or even more), depending on the reasons for it and the country(ies) where the checks are being done. Some countries are known to take much longer as their records aren't great, others will be quicker at getting the info needed. But have a search and hopefully you'll find some relevant info on some of the AP threads.