The seventh (Compline, Completorium) was added by Benedict.
Matins and Lauds (about 7.30 A.M.); Prime, Terce (High Mass), Sext, and None (about 10 A.M.); Vespers and Compline (4 P.M.); and from four to eight hours (depending on the amount of music and the number of high masses) are thus spent in choir.
VESPERS (officium vespertinum), in the Roman Catholic liturgy, that part of the daily office which follows none (nona) and precedes compline (completorium).
The omissions are said at Lauds, Prime and Compline.
Compline, technically 9 P.M., but usually combined with vespers, is a prayer for protection during the darkness.