In spoken language learning, spaced repetition is very popular and quite effective in the long run. Although, everyday use will also accomplish the same result. For example, in the Pimsleur method, you repeat like this:
Every: 5 seconds, 25 seconds, 2 minutes, 10 minutes, 1 hour, 5 hours, 1 day, 5 days, 25 days, 4 months, and 2 years.
And another I've run across, but unfortunately can't remember the name of, was:
- Every minute
- Every hour
- Every day
- Every week
- Every month
- Every year
I have also heard the phrase "You forget things 7 times before you remember them", meaning you have to study each thing at least 7 times, before you know it intuitively without refreshing.
But they all come down to the fact, that you must study the same thing not just a few times, but several times over a medium-long timespan. Otherwise they will not be stored in the long-term memory of the brain.