Which preposition to use with bumpy

in Occurrences 2%

CHAPTER II MISS PANNEY The Witton family, distant relatives of Miss Panney, with whom she had lived for many years, resided on a farm in the hilly country above Thorbury, and when Mrs. Tolbridge had rattled through the town, she found the country road very rough and badhard and bumpy in some places, and soft and muddy in others; but Buckskin was in fine spirits and pulled her bravely on.

over Occurrences 1%

My pilot was bringing her from Town one afternoon last weektook the Dorking-Leith Hill air-way, you know, always bumpy over thereand

to Occurrences 1%

Many grounds are somewhat rough and bumpy to field on, beautifully smooth though they look from the pavilion.

Which preposition to use with  bumpy