Assuming an airfield had an organic airfield repair force (bulldozers, gravel, PSP etc), and the attacking force had a plentiful supply of JP233 pods, the number of sorties required to keep an airfield suppressed was 8-12 sorties - every 24 hours. The anticipated loss rate to SAW was also high as delivery required flying down the length of the runway.
I know the anticipated loss rate for the Buccaneers against a carrier/cruiser with Sea Eagle were also high - but only expected to have to do it once.