Historical clue formulations

• "I'm on it!" — 2023-08-29
• "You betcha" — 2021-08-03
• "Gotcha, I'm on it" — 2016-08-04
• "Right-o" — 2016-06-03
• "O.K., I'm on it!" — 2014-03-24
• "You can count on me" — 2013-08-13