septennial = 220898481.828192 second
Try converting from "septennial" to autumn, century, decade, fiscal yr (fiscal year), fortnight, leap yr (leap year), millenium, minute, octennial, olympiad, pregnancy, quindecennial, quinquennial, sidereal day, sidereal month, spring, summer, week, weekend, winter, or any combination of units which equate to "time" and represent time.
septennial = 28.51 autumn, 7 calendar yr (calendar year), .07 century, 2,556.7 day, 61,360.69 hour, 3,681,641.36 minute, .77777778 novennial, .875 octennial, 1.75 olympiad, 9.33 pregnancy, 1.4 quinquennial, 220,898,481.83 s (second), 93.58 sidereal month, 7 sidereal yr (sidereal year), 27.5 spring, 27.33 summer, 86.58 synodic month, 1,278.35 weekend, 28.71 winter, 7 yr (year).
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