How many times a day did Daniel kneel and pray, even after the decree?

Answer: Three

Three times a day Daniel got down on his knees, prayed and gave thanks to his God, just as he had done before.

“Now when Daniel learned that the document had been signed, he went into his house, where the windows of his upper room opened toward Jerusalem, and three times a day he got down on his knees, prayed, and gave thanks to his God, just as he had done before.”— Daniel 6:10 (BSB)