'Weeks' in the Bible

"You shall count [off] seven weeks for you; {from the time you begin to harvest the standing grain} you shall begin to count seven weeks.

And [then] you shall celebrate the Feast of Weeks for Yahweh your God with the measure of the freewill offering of your hand that you shall give [just] as Yahweh your God has blessed you.

Three times in the year all [of] your males shall appear {before } Yahweh your God at the place that he will choose, at the Feast of Unleavened Bread and at the Feast of Weeks and at the Feast of Booths, and they shall not appear {before Yahweh} empty-handed.