Historical clue formulations

• "To repeat myself ..." — 2021-08-17
• "To repeat ..." — 2019-12-01
• "Again ..." — 2019-07-12
• "Once again ..." — 2018-02-23
• "Let me reiterate ..." — 2017-07-10
• "Since you weren't listening ..." — 2017-02-03
• "Once more ..." — 2015-02-28
• "Again ..." — 2010-07-03
• "Let me repeat ..." — 2004-09-06
• Reiteration lead-in — 2002-12-05
• "To reiterate ..." — 2000-11-17