Which preposition to use with reassertion

of Occurrences 10%

" That is the scientific account of the matter,only a reassertion of the fact.

in Occurrences 1%

He was immediately ready with his personal expression of apology and regret, and also with his reassertion in more developed argument of the principle of the Tract; and this was followed up by further explanations in a letter to the Bishop.

Which preposition to use with  reassertion