Which preposition to use with comitatus

in Occurrences 3%

Sunt enim prædicti comitatus in custodiam et honorem personæ Imperatoris, discus vassorum in ostensionem diuitiarum, et maiestatis Imperialis.

of Occurrences 3%

But the comitatus of Anglo-Saxon history preserved a more distinct existence, and this perhaps was one of the causes that distinguished the later Anglo-Saxon system most definitely from the feudalism of the Frank empire.

for Occurrences 1%

There is as little need gentlemen, in calling in the aid of a posse-comitatus for a sensible man to keep his household in order, as that a discreet trader should go whistling through the public markets, with the history of his operations.

Which preposition to use with  comitatus