Which preposition to use with coughings

of Occurrences 5%

It was curious to see how the coughing of the others, which in the Kachime had been practically constant, was here almost silenced.

in Occurrences 1%

II Lanfear's question persisted through the night, and it helped, with the coughing in the next room, to make a bad night for him.

Which preposition to use with  coughings