Top 25 Trigram Frequencies for English Letters
Vivian Cook
Spelling Stats
based on a 1 million-word sample

the

83,242

and

37,169

ing

35,586

her

23,310

hat

14,565

his

14,401

ion

14,097

ere

13,897

for

13,430

ent

13,352

tha

11,913

tio

11,414

ter

10,787

all

9,540

ver

9,516

ith

9,416

wit

9,172

ati

8,795

ers

7,864

one

7,558

ess

6,923

ate

6,783

rea

6,306

nce

6,231

ave

6,163

 

Comparisons (top 10 in order)

Gaines (1938): the ing and ion ent for tio ere her ate

Norvig (n.d.):  the and ing ion tio ent ati for her ter

Here:               the and ing her hat his ion ere for ent