Which preposition to use with carnaval

at Occurrences 1%

Within two Doors of the Masquerade lives an eminent Italian Chirurgeon, arriv'd from the Carnaval at Venice, of great Experience in private Cures.

in Occurrences 1%

The Carnaval is now over and the ladies are all at their Livres d'Heures, posting masses and prayers to the credit side, to counterbalance the sins and frailties committed during the carnaval in the account which they keep in the Ledger of Heaven.

Which preposition to use with  carnaval