sentences:  The municipal area measures 387 ha, of which 96 ha is wooded.Frohnhofen borders in the northeast on the municipality of Krottelbach, in the south on the municipality of Altenkirchen, in the west on the municipality of Breitenbach and in the northwest on the town of Sankt Wendel.Frohnhofen also meets the municipality of Ohmbach at a single point in the east.