Where Leviticus take place in the history?

Answer 1

If by "where," you mean what geographic place, it is the account of the things that happened to Moses -- and what he was told by God -- on Mt. Sinai.

If you mean "where in history," or "when," it is said by scholars to have been written in 1446 BC, at the time of the completion of the Tabernacle, as the Israelites emerged from Egypt.

Of course, because we are talking about ancient times, there is some conjecture among scholars about the exact year, but approximately 1446 BC is generally accepted, from all I can ascertain.

The Book of Exodus covers the building of that Tabernacle, and Leviticus, written priests, tells the Israelites how to worship, the principle of physical cleanliness and spiritual holiness, and dietary health.

The time period it covers approximately one month, from the construction of the Tabernacle until the numbering of the Israelites for war.

Answer 2

All of Leviticus takes place at Mt. Sinai, and after the divine indwelling of the tabernacle.