The sections marked with XXX are were the number 5 would sit if it appeared in The I Ching but it does appear in Nine Star Ki so we have to be able to work out what the Solfeggio for number 5’s would be…
1-5 - 528 - May is the missing Month
2-5 - 285 - August is the missing month
3-5 - 852 - Feb and November are the missing months
4-5 - 528 - May is the missing month here
5-5 - 285 - therefore associated with August
6-5 - 852 - Feb and November are the missing months
7-5 - 528 - May is the missing month
8-5 - 285 - August is the missing month
9-5 - 852 - Feb & Nov are the missing months
That creates 3 x 528 - 2 x 285 - 3 x 852 therefore we can presume as one 285 is missing it takes the slot for 5-5.