How often 和how many times的区别如下：
how often意思是“多久一次，多常”，用来对动作在时间上所发生的频率提问，其提问部分或答语部分往往是always, usually，often，sometimes, hardly （ever），never 等频度副词或every day, every week等“every+时段”及once a week, three times a year等“词数+时段”的副词性短语。例如：
---How often do you watch TV? 你多久看一次电视？
---Every Saturday evening. 每星期六晚上。
how many times意思是“多少次”，用来询问动作发生的次数。其提问部分或答语部分往往是表示次数的once, twicey以及three times, ten times等“基数词+times"等结构。例如：
---How many times have you been to Beijing?你到过北京几次？
---Twice. 两次。
注意下面的对划线部分提问的句子。
I go to the movies three times a week.
对three times提问：How many times do you go to the movies a week?
对three times a week提问：How often do you go to the movies.