Which preposition to use with triunity

in Occurrences 1%

TRINITY, the doctrine, variously interpreted, that in the godhead or divine nature there are three persons, respectively denominated Father, Son, and SpiritFather, from whom; Son, to whom; and Spirit, through whom are all things; is essentially triunity in unity.

of Occurrences 1%

The triunity of God is very variously explainedas the subject, object, and act of cognition; as creative spirit, wisdom, and goodness; as being, power, and deed; and, preferably, as unity, equality, and the combination of the two.

Which preposition to use with  triunity