Bytes, usually

• Planets and notes in the musical scale
• White and black pawns, e.g
• Quarterfinal groups, e.g.
• Candles in a menorah, e.g.
• Quartets times two
• Quarterfinal groups
• Day in Ascot rearranged for groups of eight
• Flag football teams

Wiktionary Word definitions in Wiktionary
n. (plural of octad English)