Recalculates a harmonic frequency rank from a HTML frequency list and writes the result to a target field.
Computation rules (Yomitan-aligned):
- Deduplicate by dictionary: only the first occurrence per dictionary is used.
- Parse numeric prefix from the value (e.g.
12345㋕->12345). - Harmonic mean with floor:
floor(n / sum(1/f)). - If no valid values, write
9999999.