Most student surf the Internet two or three times a week.对划线

How many times do most students surf the Internet a week? 或：How many times a week do most students surf the Internet?我本来是一楼,但是二三楼答案有误,怕误导楼主。如果是对two or three times a week一起提问,才是：How often do most students surf the Internet?而单独对two or three times提问的话,则用How many times做疑问词。