Which preposition to use with discreditable

to Occurrences 20%

It rather leads one to consider that an action which drives a weak nation to arrive at a decision on so awful an issue in so short a time, is an action discreditable to a stronger, and impossible on the part of a morally great, power.

in Occurrences 7%

Then added with a change of tone, "You were certain for a while that Muriel Tredworth had not only been guilty of something discreditable in her past but had stabbed to death in your presence the man who knew her secret.

from Occurrences 1%

My plan was quite obvious in its simplicity, and not in the least discreditable from my point of view.

than Occurrences 1%

For what can be more discreditable than for a man who has committed treason against the Roman people by acts of violence, after he has been condemned by a legal decision, to be able to return to that very course of violence, on account of which he has been condemned?

Which preposition to use with  discreditable