 In any such lunar cycle, which must have an integer number of days, 30-day months must occur slightly more frequently than 29-day months, such that 2 consecutive 30-day months occur at intervals of either 17 or 15 months, where the 17-month interval is approximately twice as common as the 15-month interval.This typical mean lunar cycle pattern becomes clearly evident if one computes the "molad" moment, adds 1/4 day to account for the "molad zakein" postponement rule, keeps only the integer part of the result to compute the "molad" day, calculates the difference from the previous "molad" day (will be either 30 days = "F" for full, or 29 days = "D" for deficient), and then lists the sequence with the insertion of one space in the middle of every FF pair and starting a new line at the end of every 15-month interval.For example, for the period from the "molad" of "Nisan" 5726 until the "molad" of "Elul" 5818 inclusive the pattern obtained is