Find the most important character
05AB1E, 99.999999999999999957%

1111111111111111111 ... (9352835025086960662 1's total) ... 11111g₅B.V


g gets the length of the large integer literal. Obviously this is too long for TIO, so try a version using 9352835025086960662 instead of the equivalent 1111...1111g.