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. 2021 Aug 28;22(1):121–131. doi: 10.1007/s10209-021-00838-8

Table 2.

HELF Codes

C UC Freq LC Freq Com. Freq HELF code
E 138,443 7,741,842 7,880,285 Do
T 325,462 5,507,692 5,833,154 Da
A 280,937 5,263,779 5,544,716 DoDo
O 105,700 4,729,266 4,834,966 DaDa
I 223,312 4,527,332 4,750,644 DoDa
N 205,409 4,535,545 4,740,954 DaDo
S 304,971 4,186,210 4,491,181 DoDoDo
R 146,448 4,137,949 4,284,397 DaDaDa
H 123,632 2,955,858 3,079,490 DoDoDa
L 106,984 2,553,152 2,660,136 DoDaDo
D 129,632 2,369,820 2,499,452 DoDaDa
C 229,363 1,960,412 2,189,775 DaDoDo
M 259,474 1,467,376 1,726,850 DaDoDa
U 57,488 1,613,323 1,670,811 DaDaDo
P 144,239 1,255,579 1,399,818 DoDoDoDo
F 1,00,751 1,296,925 13,97,676 DaDaDaDa
G 93,212 1,206,747 1,299,959 DoDoDaDa
Y 94,297 1,062,040 1,156,337 DaDaDoDo
W 107,195 1,015,656 1,122,851 DoDaDaDa
B 169,474 866,156 1,035,630 DaDoDoDo
V 31,053 653,323 684,376 DoDaDaDo
K 46,580 460,788 507,368 DaDoDoDa
J 78,706 65,856 144,562 DoDoDoDa
X 7578 123,577 131,155 DoDaDoDo
Z 5610 66,423 72,033 DoDoDoDoDo
Q 11,659 54,221 65,880 DaDaDaDaDa
0 DaDoDaDo
1 DoDaDoDa
2 DoDoDaDo
3 DaDoDaDa
4 DaDaDoDa
5 DaDaDaDo
6 DaDaDoDaDa
7 DoDoDaDoDo
8 DoDaDoDaDo
9 DaDoDaDoDa

C: Character, Codes and frequency of HELF characters (UC Freq.: upper case frequency, LC Freq.: lower case frequency), Com. Freq: combined frequency