Historical clue formulations

• Demographic group — 2024-02-18
• Colleague — 2020-01-05
• Associate — 2015-06-07
• Partner in crime — 2014-06-18
• Partner in crime — 2009-02-02
• Abbott, to Costello — 2001-02-27
• Associate — 2001-01-13
• Companion — 1997-07-13
• Associate — 1993-12-13