SQ now flies from CPH Monday, Thursday and Saturday. Btw it looks like SQ will operate to extra flights to CPH in the second week of January. One flight with 777-200 (ER) and one flight with A340. The A340 will operate on the 11th January.
Thai operates six times a week from now and until the summer timetable. There is a possibility that they will continue with 6 flights a week during the summer period but it depends on the bookings.
Hope it helps