octennial = 252455407.803648 second
Try converting from "octennial" to calendar yr (calendar year), century, day, fortnight, hour, millenium, minute, month, novennial, olympiad, pregnancy, quindecennial, s (second), septennial, sidereal day, sidereal month, spring, week, weekend, yr (year), or any combination of units which equate to "time" and represent time.
octennial = 32.59 autumn, 8.01 calendar yr (calendar year), .8 decade, 8.12 fiscal yr (fiscal year), 208.71 fortnight, 7.98 leap yr (leap year), 96 month, .88888889 novennial, 10.67 pregnancy, 1.6 quinquennial, 252,455,407.8 s (second), 2,929.94 sidereal day, 106.95 sidereal month, 31.43 spring, 31.24 summer, 98.95 synodic month, 417.42 week, 1,460.97 weekend, 32.82 winter, 8 yr (year).
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