Which preposition to use with penitentials

about Occurrences 1%

There ought to be something perpetually penitential about clothes.

than Occurrences 1%

It was my father's maxim that no man could do more than one thing well at a timeespecially at table; so we had contracted a habit which to strangers would have seemed even more unsociable than it really was, and gave to all our meals an air more penitential than convivial.

Which preposition to use with  penitentials