I wash more articles of clothing during the summer, but the number of loads is probably pretty similar. I wash sheets and towels more often in the summer, but I wash more/bigger bedding in the winter.

Also, instead of washing my sheets more than weekly (biweekly in the winter), I change my pillowcases every 2–3 days. It helps so much, and pillowcases take up hardly any space in the laundry… and I get to sort of perk up my room with weird/bright colors every couple of days and NOT have a big commitment.