"We work nineteen hours per week."

Translation: Pracujemy dziewiętnaście godzin w tygodniu.

[Ashibaal]

"Nineteen hours per week" is "dziewiętnaście godzin tygodniowo". Reported.

[tadjanow]

'tygodniowo', 'w tygodniu' and 'na tydzień' are all acceptable here

[Ashibaal]

And tygodniowo was not accepted; that's my point. No need to dislike my comment

[Matthew_Phelps]

In your original comment, you made it appear as if your translation was the only translation. That was why tadjanow explained the other translations.

[Winterhen]

You are right, I had same problem with "tygodniowo".

[A__drian]

Just checking: godzin is gen plural because of the number 19 and tygodniu is locative because "per" can be thought of as "in a week or out of a week"

[alik1989]

Yes, exactly.

[Hereandthere715]

Can you also say "co tydzień?"

So, I posted this four weeks ago, but haven't heard anything. Does anyone know if this is acceptable?

[Jan.K.M]

I suspect not. It would translate as "every week", which isn't quite the same. I'll be happy to be corrected if I'm wrong.

[Achim349471]

Is there a difference between the use of 'w tygodniu' and 'na tydzień' ?

[Jellei]

In such a sentence, I don't think there is. Just a grammatical one, similar to "in a week" and "per week".