Splitting a sit to find someone

Hi. I’m new to all this. I have uploaded a stay for 4 weeks. I’ve not had any response so wondering if I should
Split the dates in to two so two two weeks stays.
Assume I can only have one listing on with those dates so I’ll have to delete the 4 week listing and split it in to two.

Do sitters tend to rather short stays ? Is 4 weeks too long ?

Thanks