Spanish to English Bus/Financial Business/Commerce (general)

In a chart, about payroll services, it appears as "SEM/QUIN" in the "Frequency" column of a chart, to indicate the frequency with which this reality occurs. The reality in question is an item that falls beneath the title "Creacion de Nuevos Conceptos de Nomina:", and the item is "Recepcion - Dias festivas". I guess "sem" is referring to "semestral", but "quin" I have no idea. Something of a fifth, five times a year, or something like that but no term comes to mind.

Creacion de Nuevos Conceptos ne Nomina: Frequencia
Percepcion - Dias Festivas SEM/QUIN

Thanks,

Peter