Which preposition to use with complots

against Occurrences 1%

It is not my intention to stay long on shore, so as to give opportunity to the Moors to complot against me; as I propose only to talk with the king and to return in three days, by which time you may have every thing in readiness for our departure.

at Occurrences 1%

Live, worthy Philip; Pembrooke bids thee live, That did suspect this complot at the tombe When in the honour of Prince Ferdinand You did resigne your shield.

Which preposition to use with  complots