This is not the normal way the Israelites counted. If possible, try to translate in a way that preserves this use of the number seven. Alternate translation: "Seventy times seven years ... seven times seven years ... and sixty-two times seven years"
These words are used together to make the importance clear. Alternate translation: "You must clearly understand" or "You must know for sure" (See: [[rc://en/ta/man/translate/figs-doublet]])
Anointing is a symbolic act to show that someone is chosen. Alternate translation: "the person that God anoints" or "the person that God chooses" (See: [[rc://en/ta/man/translate/translate-symaction]])