European time units {tempus} equal to brevis began [1300 to 1400]. Tempus had two or three parts {semibreve}, each of which had two or three parts {semibreve minimae} {minimae}. Time types were three semibreves {perfect time} or two semibreves {imperfect time}, to make four time signatures {prolation}. 2/4 time had two semibreves with two minimae. 6/8 time had two semibreves with three minimae. 3/4 time had three semibreves with two minimae. 9/8 time had three semibreves with three minimae.
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Date Modified: 2022.0224