Which preposition to use with passu

with Occurrences 5%

Pari passu with this disorder of central and provincial administration increased the foreign encroachments on the empire.

in Occurrences 2%

A picture should grow pari passu in all its parts; otherwise there is no certainty of its keeping together when finished.

among Occurrences 1%

Thirdly, it is claimed that we shall not be ousted either from our own or from foreign markets by foreign competition, because the eight hours movement in England must be regarded as part of a larger industrial movement which is proceeding pari passu among the competing nations.

Which preposition to use with  passu