A fortnight is a word used to indicate two weeks.
No. It would be better to say: every week on Friday the Friday of every week the week beginning every Friday
every once a week every week
Every other week, also known as bi-weekly
The term 'every week' is an adjective (every) describing a noun (week). The noun 'week' is a common noun.
every other friday
bowls every week
Not every week, but every other week or so. It varies for each game.
Hundreds of people die in their sleep every week.
Every 1 week clean his or her cage.
every week or every other week
Every week of every month begins with Sunday.
They pay bi-weekly (every other week).