also: シックス・ナイン
six nines; 99.9999%
Technical term for extremely high availability or purity, often used in IT and engineering contexts.
This system achieves six-nines availability.
sixty-nine; 69 (sexual position)
Colloquial and vulgar; refers to the sexual position. Often used in informal or explicit contexts.
See also: シックスティーナイン
They seem to have tried sixty-nine before.
This system achieved six-nines availability.
The two of them did 69.