It may be diseased, as the leaves are yellow with brown patches and still in it's original pot it may have been waterlogged. If you look at the top of the bulb, push back the leaves with two table knives you may see what looks like cotton wool, this would be eelworm.

Apart from what Doc Bob has said......watering twice a week, seems excessive.. Try taking it out of its pot and checking its roots....you will soon see if they have rotted due to to over watering...if not...pot up in fresh compost in not too big a pot....they prefer tob e pot bound...and keep an eye on watering.....Good luck....check out growing instructions in Amaryllis page of GoYpedia

I have no advice, Guest, but this is a rathewr venerable bulb that you have taken responsibility for. I do hope that it survives for you.