Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Angelica was more common in the past and has since settled at a lower, steady level. All-time it's been given to 100,740 U.S. babies, the 1,104th most common name by sound today, peaking at 3,709 in 1996, with 420 in 2025.
By sound, Angelica also includes the spellings Anjelica, Angelika.