How frequently should I check my credit score?

You can review it once in 3 months. Also you should check your credit report if you notice your credit score has dropped suddenly.

You should check your credit score once in 3 months. If your credit score is bad, you can take prompt action to improve it. Just remember, it takes time to improve credit score. It isn't a magic. So, the sooner you take action, the better.

True. checking your credit score every 3-4 months will help you in tracking the scores and in its improvement.