何回 literally means "how many times", so it is "how many times do you watch movies/learn Japanese a month?", but yeah, it sounds more natural when we translate it as "how often do you watch movies/learn Japanese a month?". We can also say,１か月に　どのくらい(の”頻度/ひんど”で)　えいがを　見ますか。 And its literal translation is "how often do you watch movies a month?"

ー＞　１か月に　何回　えいがを　見ますか。 ー＞　１回　みます。 Q. How often do you watch a movie a month? A. I watch it a month. ー＞　１しゅうかんに　何回　日本語を　ならいますか。 ー＞　２回　ならいます。 Q. How often do you learn Japanese a week? A. I learn it twice a week. Q. How many movies do you watch a month? A. I watch two movies a month. １か月に　何本　えいがを　見ますか。 ２本　見ます。

（１）　How often do you watch movies a month? （２） How often do you learn Japanese a week? or How often are you learning Japanese a week? 「何回」　means "how often". Good luck!