Which preposition to use with palliatives

of Occurrences 8%

A rupture with Rome, in spite of endeavours to postpone it by the diplomatic palliative of embassies, could no longer be avoided.

for Occurrences 3%

There are many palliatives for the evils which I have discussed.

in Occurrences 1%

Doubtless, she thought, Bosio's presence acted as a palliative in the somewhat grim atmosphere of the Palazzo Macomer.

to Occurrences 1%

As a palliative to this rash arrogance, people are in the habit of giving way on everything.

Which preposition to use with  palliatives