Clean undies every day, other clothes get washed when they need it, jeans and such can go weeks without getting washed. Towels weekly, bedding weekly, but I am a bit obsessive about t-towels and dish cloths which get replaced every day, twice if they look grubby. No flannels in this house, think they are revolting things. When children were at school, they wore clean underwear, polo shirts and socks/tights every day, sweatshirts and skirts/trousers were washed when they were dirty. I have never seen the point of washing clean clothes!