He received this dispensation from Pope Urban VI and was invested as bishop by Emperor Wenceslaus in February 1385.

[1] According to the chronicle written by Wilhelm Werner von Zimmern in 1550, Frederick loved beautiful horses and spent lavishly on his own court [2] and thrifty on other business.

The upper end of the bishopric, around Herrieden was the hardest hit: it suffered from a war between the local princes and the Swabian League of Cities.

He managed to end the feuds between the bishopric and the noble families of Absberg, Abensberg, Schwarzberg and Seckendorff and with the Burgraviate of Nuremberg.

He was buried in the Willibald choir of the cathedral in Eichstätt, where he had donated an altar dedicated to Saint Barbara, whom he revered highly.

His sister Elisabeth of Oettingen (d. 9 July 1406) was a lady-in-waiting at the court of Elector Palatine and later King Rupert III.

Her grave, with a magnificent epitaph showing the coat of arms of the House of Oettingen, has been preserved in the Collegiate Church in Neustadt an der Weinstraße.