How often是接时间状语从句吗？

Question

如题所述

Answer 1

----- how often是接  状语从句  （表述 频率）

---- I  don't know how often you exercise a week.    我不知道你一周锻炼几次。

Answer 2

how often

指每隔多久，主要用来对频度副词或状语(如once a week等)提问：

How often does he come here? —Once a month.

他(每隔)多久来一次? —一每月一次。

How often do you visit your mother?一Once a week.

你多长时间看你妈妈一次?——一周一次。

How often do you go to the dentist?一I go every six months.

你多久去看一次牙齿?——我每6个月去一次。