Which preposition to use with viaggio

for Occurrences 1%

And now, for a few moments, she forgot herselfforgot to watch for Marco, her thoughts busied with the sad tale of Fra Francesco, which Piero, always in viaggio for business of the Senate, had told her but a few days beforenews that had reached him from the frontier.

per Occurrences 1%

non porterano mercantie de contrabando, et che constara per fede authentica et con lettere patente de sanita, poteran liberalmente victualiarse de tutte le victuarie necessarie, et praticare in questa isola et dominij, et poi partisene et seguire suo viaggio per doue volessero in leuante o altroue, come tutti altri vaselli et specialmente de Francesi et aitri nationi, et die venderi et comprare qual si voglia mercantia a loro benuista.

Which preposition to use with  viaggio