How often did you see a movie last month

How often did you see a movie last month
How often did you see a movie last month

How often did you see a movie last month
你上个月多久看一次电影?

你上个月多久去一次电影院。

你上个月多长时间看一次电影（这里没有电影院的意思）

你上个月多久去看一部电影？How often是问频率的

你上个月看电影的频率是是多少啊？

应该是：你上个月看了几次电影