ṣaḍ yāmaḥ sapta vā nṛṇām

laghuni-such laghus (each of two minutes); vai-exactly; samamnata-is called; dasa panca-fifteen; ca-also; nadika-a nadika; te-of them; dve-two; muhurtah-a moment; praharah-three hours; sat-six; yamah-one fourth of a day or night; sapta-seven; va-or; nrnam-of human calculation.