Octennial Quindecennial

Octennial → Second octennial → s Second → Octennial s → octennial Octennial → Minute octennial → min Minute → Octennial min → octennial Octennial → Hour octennial → h Hour → Octennial h → octennial Octennial → Day octennial → d Day → Octennial d → octennial Octennial → Year octennial → yr Year → Octennial yr → octennial Octennial → Millisecond octennial → ms Millisecond → Octennial ms → octennial Octennial → Microsecond octennial → µs Microsecond → Octennial µs → octennial Octennial → Nanosecond octennial → ns Nanosecond → Octennial ns → octennial Octennial → Week octennial → wk Week → Octennial wk → octennial Octennial → Month octennial → mo Month → Octennial mo → octennial Octennial → Decade octennial → dec Decade → Octennial dec → octennial Octennial → Century octennial → cent Century → Octennial cent → octennial Octennial → Millennium octennial → mil Millennium → Octennial mil → octennial Octennial → Picosecond octennial → ps Picosecond → Octennial ps → octennial Octennial → Femtosecond octennial → fs Femtosecond → Octennial fs → octennial Octennial → Attosecond octennial → as Attosecond → Octennial as → octennial Octennial → Shake octennial → shake Shake → Octennial shake → octennial Octennial → Month (synodic) octennial → month Month (synodic) → Octennial month → octennial Octennial → Year (Julian) octennial → y Year (Julian) → Octennial y → octennial Octennial → Year (leap) octennial → y Year (leap) → Octennial y → octennial Octennial → Year (tropical) octennial → y Year (tropical) → Octennial y → octennial Octennial → Year (sidereal) octennial → y Year (sidereal) → Octennial y → octennial Octennial → Day (sidereal) octennial → d Day (sidereal) → Octennial d → octennial Octennial → Hour (sidereal) octennial → h Hour (sidereal) → Octennial h → octennial Octennial → Minute (sidereal) octennial → min Minute (sidereal) → Octennial min → octennial Octennial → Second (sidereal) octennial → s Second (sidereal) → Octennial s → octennial Octennial → Fortnight octennial → fortnight Fortnight → Octennial fortnight → octennial Octennial → Septennial octennial → septennial Septennial → Octennial septennial → octennial Octennial → Novennial octennial → novennial Novennial → Octennial novennial → octennial Octennial → Quindecennial octennial → quindecennial Quindecennial → Octennial quindecennial → octennial Octennial → Quinquennial octennial → quinquennial Quinquennial → Octennial quinquennial → octennial Octennial → Planck time octennial → tP Planck time → Octennial tP → octennial