7 times, 3 succesful according to fbref.com. Most in Barcelona...
He isn't a very great or ambitious defender I must say, watching the highlights. His positioning on the first goal is strange and lazy, and then there was a Suarez chance just after that where he was incredibly lazy in following the run to the obvious rebound - lucky for Dest that Suarez didn't get it 1dm to the left, then Dest would be very much at fault for a goal. https://www.youtube.com/watch?v=QrL0Jm6eFlc