Prob 2 to 3 weeks 6 days out of 7 - denim jeans are meant to be hardwearing and they hardly get dirty in the office. My pairs usually last a couple of years each, and that's usually to do with them not fitting anymore, as opposed to them thinning.
Wash mine every 1 or 2 wears.
How long is each wear and do you work in a mine?
A night out or a football match, something along those lines.
Oh, and no.
To watch a football match![]()
I change mine every day.