Which preposition to use with wanderjahre

of Occurrences 1%

A clever young mechanic, at the age when the Wanderjahre of the medieval craftsman used to begin, would come home after tending a 'speeded up' machine from 8 A.M., with an hour's interval, till 5 P.M. At 6 P.M. he had finished his tea in the crowded living-room of his mother's house, and was 'free' to do what he liked.

Which preposition to use with  wanderjahre