We never use "pour" to indicate a duration

Dated July 2016
Dear Jim,

Thanks for reporting a mistake on the site, and I apologise for taking so long to reply to you.
I have seen and agreed with your very useful feedback, but unfortunately I haven't had the time to address it properly yet.
I'm really sorry not to have come back to you sooner, but I added this lesson to my priorities, and I will adress it as soon as I'm able to. Of course, I will keep you posted when that's done.

I really appreciate you taking the time to let us know so we can maintain the highest standard of quality in our content.

Je m'excuse encore et merci beaucoup !