Back of and Last-minute

Back of preposition - At, to, or toward the rear of.

Last-minute and back of are semantically related. In some cases you can use "Last-minute" instead an adjective phrase "Back of".

Last-minute adjective - Just before a deadline; at the last minute.

Back of and last-minute are semantically related. Sometimes you can use "Back of" instead an adjective phrase "Last-minute".