According the Years of an Hireling
F. Delitzsch. Isaiah 21:16-17 For thus has the LORD said to me, Within a year, according to the years of an hireling, and all the glory of Kedar shall fail:… In a year's time, calculated as exactly as is the custom between employers and employed, Kedar's freedom, military strength, numbers, and wealth shall have vanished. (F. Delitzsch.) Parallel Verses KJV: For thus hath the Lord said unto me, Within a year, according to the years of an hireling, and all the glory of Kedar shall fail: WEB: For the Lord said to me, "Within a year, as a worker bound by contract would count it, all the glory of Kedar will fail,