What are your work clothes like? When I was a temp, my work clothes were all dry clean only (not that I did..) or at the very least not-denim. I did my best to keep them nice, and they usually lasted me a while.
Now, of course I spend my work life in leggings which have a much shorter shelf life than my old work wear. There’s nothing less appealing than baggy-kneed workout trousers, so I have to swap them about fairly frequently. These are a casualty of the semi-annual Lycra amnesty, and I’m looking forward to the invigorating snap of their replacements!