Historical clue formulations

• Most beloved — 2022-09-04
• Billet-doux recipient — 2014-03-09
• Salutation in an old-fashioned love letter — 2012-10-03
• Sweetie pie — 2012-06-05
• Honey — 2009-02-21
• Honey — 2005-07-10
• Sweetie pie — 2004-12-19
• Sugar substitute? — 2002-05-31
• Billet-doux opening — 1999-12-11
• Honey — 1995-02-22
• "Mommie _____" (Christina Crawford book) — 1994-02-28