Which preposition to use with bedtime

for Occurrences 4%

"It is bedtime for us all.

with Occurrences 2%

But it is often a source of great relief during mental strain to bathe the face, neck, and chest freely at bedtime with cold water.

by Occurrences 1%

The boys brought some of their games downstairs, and succeeded in adding half an hour to their bedtime by coaxing Aunt Lavinia to play with them, until I finally had to almost carry them to bed, they grew so suddenly sleepy from their day's fishing.

in Occurrences 1%

You seem to forget that eleven o'clock is the very latest bedtime in Hampton.

on Occurrences 1%

So back once more they fared, to find Mrs. Tossell busily laying supper; and close after supper came prayer, and bedtime on the stroke of nine.

to Occurrences 1%

" Then said he: "It's 'most bedtime to home.

Which preposition to use with  bedtime