How many time do Catholics strike their breast saying mea culpa?

Oh, isn't that a lovely question, friend? Catholics typically strike their breast three times during the Confiteor, saying "mea culpa, mea culpa, mea maxima culpa," which means "my fault, my fault, my most grievous fault." It's a beautiful gesture of acknowledging our mistakes and seeking forgiveness. Just remember, we all make mistakes, and it's important to be kind to ourselves and others as we learn and grow.