Final answer:
Complete linen changes in nursing centers typically happen on the individual's bath day, which may be once or twice a week, aiding in patient hygiene and comfort.
Step-by-step explanation:
In nursing centers, a complete linen change is typically done on the person's bath day, which may occur once or twice per week. Considering hygiene and comfort for long-term bedridden patients, like the one described, it's important that linen is changed regularly to prevent conditions such as bedsores and infections. Furthermore, in the scenario where a patient has refused to leave bed for an extended period, a weekly change in clothing and linens would have contributed to delayed discovery of any developing health issues.