Which preposition to use with somnolence

of Occurrences 5%

She felt within her also a tendency to somnolence, the somnolence of satiety, as if she had feasted too copiously off some spicy dish, after too great a hunger.

in Occurrences 2%

It would probably give way to melancholy or somnolence in the course of half an hour.

on Occurrences 1%

The company were in the main attentive, with the exception of a little somnolence on the part of the old gentleman opposite at times, and a few sly, malicious questions about the "old boys" on the part of that forward young fellow who has figured occasionally, not always to his advantage, in these reports.

Which preposition to use with  somnolence