______ do you practice piano a week?--- Twice.

问题描述:

______ do you practice piano a week?--- Twice.
为什么答案是How many times,提问频率不用How often吗?

填 How many times 多少次( 答语:两次)
注:如果用HOW OFTEN 多久一次,答语应该是 Twice a week