The ⚀hexa·biqua·timel, or semi·tricia·day, or ⚀sweep

Quantitytime
Formal name⚀hexa·biqua·timel
Formal abbr⚀h•b↑tmℓ
Colloquial name⚀sweep
⚀nick
Colloquial abbr⚀swp
⚀nck
Derivationsemi·tricia·day
Derivation abbrb\t↓dy
TGM equiv= biqua·Tim
TGM equiv abbr= b↑Tm
SI & USC equiv= 21z|25d seconds
scaling01:01:+:02:6.0