'Weeks' in the Bible

'Seven weeks thou dost number to thee; from the beginning of the sickle among the standing corn thou dost begin to number seven weeks,

and thou hast made the feast of weeks to Jehovah thy God, a tribute of a free-will offering of thy hand, which thou dost give, as Jehovah thy God doth bless thee.

Three times in a year doth every one of thy males appear before Jehovah thy God in the place which He doth choose -- in the feast of unleavened things, and in the feast of weeks, and in the feast of booths; and they do not appear before Jehovah empty;