Historical clue formulations

• Hoi ___ — 2019-10-03
• Hoi ___ — 2012-12-27
• Hoi ___ — 2012-06-17
• Hoi ___ — 2011-08-28
• Hoi ___ — 2011-07-17
• Hoi ___ — 2009-12-16
• Hoi ___ — 2009-01-04
• Hoi ___ — 2003-01-06
• Hoi ___ — 1999-09-23
• Greek for "many" — 1998-09-11