Historical clue formulations

• "Ah, yes …" — 2024-05-16
• Exclamation of revelation — 2023-06-17
• "Ohhh …" — 2022-12-30
• "Ahhh" — 2021-05-21
• "Ah, yes ..." — 2021-04-30
• Words accompanying a head slap — 2017-04-08
• Words of understanding — 2017-01-21
• "Ah, got it" — 2016-08-05
• "Oh, so that's it" — 2008-12-05
• "That clarifies it" — 2005-05-01