Whoever interviewed you should have counselled you on completion. They should have told you why you were turned down and what you need to do to rectify any shortcomings. They should have told you when you can go back for a further interview. There's no definate answer to this, as it's up to the individual recruiter to make the decision based on what is discussed during the interview.
Sorry I can't answer this one with a date. The best thing you can do is ring up your recruiter and ask them when you can be re-interviewed.