What letter pairs are the most frequent in English written text? [closed]

Hardly a question about English usage but it has its charms. Here are the first 20 pairs from a list of a few hundred that I derived from the complete Mathematica Dictionary (see Mathematica) of over 90K words. I add that this is a general purpose dictionary and that any list of words from any other dictionary could be used. The frequency of each letter pair is given as a percentage of all dictionary words in which the pair occurs.

Do you need any more?

{in, 19}, {er, 18}, {es, 16}, {ng, 12}, {ti, 12}, {re, 11}, {te, 11}, {ed, 11}, {on, 10}, {at, 10}, {st, 9.7}, {an, 9.1}, {en, 8.9}, {le, 8.6}, {ri, 7.9}, {ra, 7.8}, {al, 7.8}, {li, 7.6}, {ar, 7.5}, {is, 7.0}