Charting Frequency Long Term Care Medicaid

I am a LPN, and I have a mix of patients which are skilled, and some that are LTC Medicaid. How frequent should I be charting on the LTC residents ? (I chart by exception for them now.) I am familiar w/ the MDS process, I used to be a Food Service Director and had to do section K myself, and I remember my former facility had Medicaid audits, where the facility lost money because of inadequate documentation. Any help would be appreciated.