It's up to you how often you choose to repeat these mantras, but it's generally recommended to repeat them at least once a day, ideally during a time when you can quiet your mind and focus on your intentions. You can repeat them silently to yourself or out loud, and you can choose to focus on a different mantra each day or repeat the same one for a period of time. The key is to find a frequency and method that works for you and feels comfortable.