In my experience, anywhere between two weeks and a month.
Depending on the time of year it can be anything from a few days to a couple of weeks. When there is a need to be fully staffed for September and there is quite a lot of movement in staffing schools are keen to advertise, interview and secure teachers ASAP to prevent good ones going elsewhere. At this time of year there is less pressure and schools may take more time to respond. If you have not heard after a week to ten days you could ring and ask. Sadly, in some schools, no news means no interview and they do not always write to say 'sorry'. The Sage