Almost daily; there were several per week, often one per day, sometimes with a few days gap in between up until mid March or thereabouts (guess it depends on the length of the engineering checks on each individual frame at the hangar). Ask anyone at the airport, or indeed at GLA, and they can confirm that. Anyone who thinks Ryanair must keep pax ops PIK due to heavy maintenance in the hangar should think again.
Oh, and just one aircraft went to GLA when the base opened, and the base still has one aircraft.