She plays the violin every Sunday.(every Sunday 底下划线 对划线部分提问

How often does she play the violin?
不能用when提问,every Sunday是表示频度的时间状语,
只能用How often “多频；多长时间一次”
希望我的回答能够帮到你,
凡是有every day,twice a week,sometimes,never 等跟动作发生概率或频度有关的时间状语,一律用How often 提问.