Which preposition to use with managership

in Occurrences 1%

On my twenty-first birthday I received £500, and this (unknown to Herbert) I managed to make over to my friend in order to secure him a managership in a business house.

of Occurrences 1%

Doubtless, the illustrious bandit, having sent in his resignation of the general managership of the Grand Transasiatic, continues his lucrative career in the depths of the Mongol provinces.

Which preposition to use with  managership