Which preposition to use with flatness

of Occurrences 30%

He walked through the hot July streets with that feeling of flatness of the want of a mild excitement apart from his own home.

to Occurrences 2%

After a day or two he even began to be critical, and on Monday evening went so far as to complain of its flatness to the wide- eyed landlord of the "Royal George." "Too much cellar-work," he said, as he finished his glass and made for the door.

about Occurrences 1%

There would be a flatness about it all which would make any such interchange of words impossible.

after Occurrences 1%

If a joke falls flat, a small school of æsthetes only ask us to notice the wild grace of its falling and its perfect flatness after its fall.

at Occurrences 1%

There is nothing amateurish in the workmanship; the reader is not doomed to soar into extravagances at one moment, and sink into flatnesses at another.

Which preposition to use with  flatness