Okla. Stat. tit. 41, § 109

A. In the absence of agreement, the occupants of a dwelling unit shall pay to the landlord as rent the fair rental value for the use and occupancy of the dwelling unit. B. Rent shall be payable at the time and place agreed to by the parties. Unless otherwise agreed, the entire rent shall be payable at the dwelling unit at the beginning of any term of one (1) month or less, while one (1) month's rent shall be payable at the beginning of each month of a longer term.