Planned Maintenance/ Activity but no cycle time

Hi PM Gurus,

Quite new to Plant Maintenance, and would like to ask a question.

I have a planned program for maintenance of some plantation, which requires maintenance lets say,

on February and October of the year for one type of activity, and maybe June and September of the year, for another activity, so they may not have any cycle time, but they require to maintain it for twice

a year. Its more of a program scheduled for each of numerous activities required to maintain

the plantation.

Is this considered as Preventive Maintenance or Ad-Hoc Maintenance, as there is no exact cycle

time as required to be set for Preventive Maintenance, but its a planned activity.

Thanks so much for your help. Best Regards