How often would you bathe a longhair outdoor cat?

She doesn’t like it so much.. (But I recently learned that cats sense heat more than we do. So if the water feels lukewarm to me, its scalding her…... so no wonder she hates baths.) Its been…. about two years since she’s been bathed. I don’t think vinnie (short hair outdoor cat) has ever been bathed. Both cats were rescues obtained as adults. Neither have any fleas.