week-day, working days, workaday routine, weekday
along, down, through, across, around
about, on the subject of
by the means of
after a certain age
to (indicating to the end or limit of an object)
on (weekdays, specific part of a day)
Она рабо́тает с 9 до 5 ка́ждый день.
She works 9-5 every weekday.
Она всегда занята́ по будням.
She's always busy on weekdays.