microsecond = 0.000001 second (time)
Try converting from "sigma" to calendar yr (calendar year), day, decade, fiscal yr (fiscal year), fortnight, month, novennial, octennial, olympiad, pregnancy, quindecennial, quinquennial, s (second), septennial, sidereal day, sidereal yr (sidereal year), summer, week, winter, yr (year), or any combination of units which equate to "time" and represent time.
sigma = 1.29E-13 autumn, 3.17E-16 century, 1.16E-11 day, 3.17E-15 decade, 8.27E-13 fortnight, 3.17E-17 millenium, 3.52E-15 novennial, 4.23E-14 pregnancy, 6.34E-15 quinquennial, .000001 s (second), 4.53E-15 septennial, 1.16E-11 sidereal day, 4.24E-13 sidereal month, 3.17E-14 sidereal yr (sidereal year), 1.25E-13 spring, 1.24E-13 summer, 3.92E-13 synodic month, 1.65E-12 week, 5.79E-12 weekend, 3.17E-14 yr (year).
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