Shake Quindecennial

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