It is required to view 4.000 hours in a year to get monetized by Youtube. Let me help you to do the simple math to simplify your monetization process.
4.000 hours=240.000 minutes.
You need to be watched 240.000 minutes in a year but in fact, you should take into account the verification time which may last forever for some Youtubers.
Let’s assume that Youtube needs 2 months to verify your channel (not sure about this).
Put it simply, you need to be watched 800 minutes a day. If you have mediocre content (in terms of trendy Youtube viewer standards) every user spend a minute in your videos. It means you need to attract 800 visitors in a day.