Which preposition to use with dissevering

from Occurrences 12%

My father's moral convictions, wholly dissevered from religion, were very much of the character of those of the Greek philosophers; and were delivered with the force and decision which characterized all that came from him.

in Occurrences 1%

After the taking of Puerto Cabello, Paez administered the affairs of Venezuela as Provisional Chief of the State, and held that office under the Congress of Colombia, until the two republics were dissevered in 1830, when he was elected first President of Venezuela.

Which preposition to use with  dissevering