According to Deuteronomy 2:14, how long did Israel take from Kadesh-barnea to crossing the Brook of Zered?

Answer: 38 years

It took thirty-eight years, until that entire generation of fighting men had perished from the camp, as the LORD had sworn.

“The time we spent traveling from Kadesh-barnea until we crossed over the Brook of Zered was thirty-eight years, until that entire generation of fighting men had perished from the camp, as the LORD had sworn to them.”— Deuteronomy 2:14 (BSB)