How often does the bed need levelling

How often does the bed on the Sovol 06 need levelling? I know there will not be an absolute time period, but general guidence of the time period would be most appreciated.

Once a week
After x number of prints


I probably run the level sequence once every 2 weeks unless I do anything to the print head like change/clean the nozzle.

I relevel when i do z alignment.

Thanks for your replies.

when/how often is that?

For me I’ll do z alignment and bed leveling everytime I change filament.

My reason is z axis might might be uneven after changing filament. Realignment of z axis will have an affect on bed leveling. This is from my experience. Your experience might be different from my tho.