I've never had that. Once I've pushed them in as far as they'll go onto the hose then screwed the base on nice and tight I've never had one come off or leak from that part. I've only ever had leaks from where the fittings click together or from where plastic fittings have cracked, and then only with non-brass fittings.
You shouldn't have to be replacing the fittings every 6 to 12 months.
Do you have particularly high water pressure? Do you turn off the tap after use and depressurise the hose?
Mine don't leak from the click parks, they leak where the plastic fittings connect to the hose, as far as I can tell. They go on fine, don't leak for a while, then get worse. Sometimes they blow completely off the end of the hose, which I guess is a combination of use and pressure. The hose does it outside 24/7 but is in an area that is sheltered, mostly in shade except for the height of summer.
Water pressure here is higher than average. We have a pressure reduction thingy under the house that takes it down from super high to merely quite high, as it works better for showers. So maybe the problem is pressure is higher than most places.