Which preposition to use with intromission

of Occurrences 2%

In the ancient, and in the modern romantic, drama, oracles, portents, prophecies, horoscopes and such-like intromissions of the supernatural afforded a very convenient aid to the placing of the requisite finger-posts"foreshadowing without forestalling."

without Occurrences 1%

It may be urged, and with great plausibility, that there may be intromission without fraud; which, however true, will by no means justify an occasional and arbitrary relaxation of the law.

Which preposition to use with  intromission