Historical clue formulations

• Concerning, with "of" — 2023-04-21
• Fitting — 2016-12-21
• Fittingly — 2016-01-04
• Befitting — 2015-08-11
• Suitable — 2013-01-23
• Regarding — 2011-06-17
• *Fitting — 2010-10-12
• Pertinent — 2010-06-21
• Germane — 2009-11-29
• On point — 2007-04-27
• Fit — 2001-07-22
• Opportune — 1999-05-23
• Germane — 1998-03-06
• Germane — 1994-06-04