Which preposition to use with semel

in Occurrences 7%

Sicut viri equitant, tendunt, et currunt per patriam pro negotijs sic et mulieres, quoniam et ipse operantur omnia ferè artificia mechanica sicut pannos et quicquid efficiter de panno, corio, sericoque, minantque carrucas, et vehicula, sed viri fabricant de ferro et de omni metallo, lapidibus atque ligno, nec vir nec mulier nobilis aut degener comedit vltra semel in die communiter.

via Occurrences 2%

Omnibus una manet nox, et calcanda semel via lethi.

Which preposition to use with  semel