Is smoking 3 cigarettes a week better then smoking regulary? and does it destroy your recovery systfm more then smoking more often?

Smoking: Any tobacco is bad for you but the more and the longer you smoke injures your immune system and leaves you open to the possibility of developing cancer

Doesn't matter.: As far as permanent damage to your body is concerned, it doesn't matter how little you may smoke. There's no threshold below which smoking cigarettes loses its potential for harm. Just don't smoke at all.