Despite what you may think, it’s ok for people with any skin type to exfoliate their face.
For sensitive/irritable skin types: Start by exfoliating once a week, working your way up to twice if you like.
Dry skin: Two to three times per week
Oily/combination skin: Exfoliating 3x a week will suffice, with 4x being the max.
Always check the recommended usage on your product and adjust seasonally; increase during autumn/winter and decrease during the spring/summer months when you’re spending more time in the sun.