They didn't. Lost it on the final day.
The thing about Freiburg is that they are one of the two smallest clubs in Bundesliga, yet they were seriously competing for Champions League. They have no money and not a single star player. When Streich took over in 2011 they were stuck at the bottom of the table and no one thought they would avoid relegation. The Premier League equivalent would be to coach Reading to a 4th place finish.