From the sheaf of the wave offering, how many days were counted until the new grain offering?

Answer: Fifty

Israel counted seven full weeks, fifty days, from the sheaf of the wave offering, then presented an offering of new grain.

“From the day after the Sabbath, the day you brought the sheaf of the wave offering, you are to count off seven full weeks. You shall count off fifty days until the day after the seventh Sabbath, and then present an offering of new grain to the LORD.”— Leviticus 23:15-16 (BSB)