Which preposition to use with facilitation

of Occurrences 7%

The constitution of the League was framed in 1895; and I note with regret that positively the five "principal objects of the League" mentioned therein have solely to do with the extension and facilitation of Britain's trade, and the "co-operation of the military and naval forces of the Empire with a special view to the due protection of the trade routes."

for Occurrences 2%

It not only accepted progress as an unmistakable factmistaking, however, acceleration and facilitation for progressbut in its mad folly believed in an immutable law of progress which, working with the blind forces of machinery, would propel man forward.

Which preposition to use with  facilitation