microsecond = 0.000001 second (time)
Try converting from "sigma" to autumn, calendar yr (calendar year), century, day, decade, minute, novennial, octennial, olympiad, pregnancy, quindecennial, quinquennial, s (second), septennial, sidereal month, summer, synodic month, week, winter, yr (year), or any combination of units which equate to "time" and represent time.
sigma = 1.29E-13 autumn, 3.17E-14 calendar yr (calendar year), 1.16E-11 day, 8.27E-13 fortnight, 2.78E-10 hour, 3.16E-14 leap yr (leap year), 1.67E-08 minute, 3.80E-13 month, 3.52E-15 novennial, 3.96E-15 octennial, 7.92E-15 olympiad, 4.23E-14 pregnancy, 6.34E-15 quinquennial, .000001 s (second), 4.53E-15 septennial, 1.16E-11 sidereal day, 3.17E-14 sidereal yr (sidereal year), 1.25E-13 spring, 3.92E-13 synodic month, 1.30E-13 winter.
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