[Koha] problem to set advance pattern in serial subscription

[vikrant malik]

hi all

 i  have a  journal  which has  frequencies   by month  pattern  is
"volume, issue".
 after received 6 issue volume should  change but issue continue like
exp.
vol1 issue1
vol1 issue2
vol1 issue3
vol1 issue4
vol1 issue5
vol1 issue6
vol2 issue7
vol2 issue8
vol3 issue9

please tell me how to set frequencies  in koha for journals.

thanks in advanced