Which preposition to use with quieten

at Occurrences 1%

Finding their screams and struggles in vain they quietened at length, and then Wurrunnah told them not to be afraid, he would take care of them.

in Occurrences 1%

All bad things quieten in the night time, and the ugly thing itself will put on some sort of a decent face!

Which preposition to use with  quieten