Historical clue formulations

• Musical equivalent of two whole notes — 2021-10-23
• Two whole notes, essentially — 2020-03-06
• Music symbol — 2007-09-08
• Mark over an unstressed syllable — 2006-09-02
• Alla ___ (music notation) — 2005-12-27
• Pronunciation mark — 1999-11-19
• Alla ___ (2/2 time) — 1999-07-20
• Vowel mark — 1994-01-08