My mum's 工人 要2.5 個鐘. Each morning leaves home at 10am and comes back at 12.30pm. Travelling to the market by bus takes only 25 mins (including wait time), so she's in the market for over 1.5 hours.
As my parents are not at home everyday until 8pm, she can 'ton pork'.
I always live with my parents because C6 always go to business trips so I know her working habit.
My ex-maid went to market for 1 hr and 15 mins. My new maid just 40 - 45 mins. Same as me. If she is not go for a long time, it's ok for me, just give her to take a breath, but my ex-maid went for 1 hr 40 mins b4, I talked to her don't go for too long time. I need to walk 15 mins to the market. So, for me, within 1 hour is reasonable.