Kkh appt wait time after polyclinic referral

Hi! Can I know for those who got referral from polyclinic, how long till they contacted you for your appt and how long later was the appt? Do they schedule you based on when you get referral or based on how many weeks you are at? Tried finding but the answers were all years ago trying to get a more updated estimate Ftm here , so nervous for my first appt, hoping it can be soon Thank you!