most common 3-letter non-vowel sequence

[http://dummy.us.eu.org/robert (Robert)]

>From the dictionary, I got the below.  But, I'm realizing that the
question that was being asked might have been about an analysis over all
text, not just the dictionary.

grep -v '^[A-Z]' /usr/dict/words | grep -o '[b-df-hj-np-tv-xz][b-df-hj-np-tv-xz][b-df-hj-np-tv-xz]' | sort | uniq -c | sort -rn

    782 str
    637 ght
    579 nts
    475 sts
    459 tch
    459 ngs
    411 nch
    386 ntr
    337 cks
    325 nst
    323 rch
    321 ngl
    302 nds
    294 mpl
    287 scr
    256 rth
    221 ntl
    217 rds
    212 nth
    207 mbl
    205 lls
    193 ckl
    175 sch