F₄E₁M₃T₁O₁S₁E₁C₃O₁N₁D₂S₁

20 points

FEMTOSECONDS is validvalid

FEMTOSECOND, one short scale quadrillionth of a second [n]

168,176 of 196,601 in NWL2023·also valid in CSW24

FEMTOSECOND, one quadrillionth part of a second [n]

87,217 of 280,887 in CSW24·also valid in NWL2023