I don't like that term.
Oh it'll take 3 to 5 business days.
It'll take 7 to 10 business days.
Business.
What a wretched enterprise.
No act as deplorable as business should deserve the distinction of its own brand of days.
Say you what you really mean-
NOT WEEKENDS!
It'll arrive in 3 to 5 days NOT WEEKENDS.
Don't count the weekends!
3 to 80 days days not counting weekends.
Oh but business days is more efficient phrasing.
As if I, Shmandy, would be moved by the devil's slippery logic of the tongue.
ha ha