When i was a student, i could practice languages for 3 hours a day.
If you want to take a result, you should usually do it.
You should find some hours a day to read something or may be something to talk.
I want to study languages for reading internet or foreign books.
And for speaking in different travels.
Unfortunately, if you don't speak language constantly, it is quickly forgotten.
You need to learn a few words a day and to use them.
Then i was a student, i could afford it, but unfortunately there is too little free time for a day.
To know languages is very convenient, because you can talk in different countries on various issues.