hi dean,
I've asked this before,
I basically say monthly (every 4 weeks and your in danger of showing up twice in the same month
)
I tell custy monthly but i can be upto 6 weeks with bank hols, holidays, and lost time to heavy rain, but i do work all year and in light rain/drizzle.
i have my george program set to 5 weeks sometimes i'm ahead of schedule but never do custy earlier than monthly i.e done on 4th august not again til earliest 4th sept.
6 weeks feels right to me but i don't want to set things in concrete as i would need more work and there will always be someone saying your late, your early.
As said when you first start you have to grin and bare it.
when you've got a good size round inform all custy's it's monthly or six weeks.
I have a handful of jobs at 8 weeks they are on their own and are £25 upwards.
In my experience the custy will try it on and suggest 8 weeks especially say it's a £20 allround detached,
I say sorry monthly, if they still dig their heels in then i say i can just do front/side £10 and back when they want.
If asked why i just say i can only run one frequency as things get compliated and petrol is too expensive and i have keep driving to minimum