"A Connecticut Yankee in King Arthur's Court", by Mark Twain

 Rank  Occurances  Percentage    3-tuple
       (of 106370)
   1         88    0.0827301%    it was a
   2         52    0.0488860%    there was a
   3         40    0.0376046%    out of the
   4         34    0.0319639%    it was the
   5         31    0.0291436%    it is the
   6         30    0.0282034%    in the world
   7         27    0.0253831%    there was no
   8         26    0.0244430%    one of the
   9         26    0.0244430%    a couple of
  10         25    0.0235029%    but it was
  11         24    0.0225628%    was going to
  12         24    0.0225628%    the rest of
  13         24    0.0225628%    the king and
  14         22    0.0206825%    the king was
  15         22    0.0206825%    it is a
  16         21    0.0197424%    it would be
  17         21    0.0197424%    i could have
  18         21    0.0197424%    and it was
  19         20    0.0188023%    it was not
  20         20    0.0188023%    by and by
  21         20    0.0188023%    as soon as
  22         19    0.0178622%    would have been
  23         19    0.0178622%    to the king
  24         19    0.0178622%    i had to
  25         19    0.0178622%    and i was
  26         19    0.0178622%    a good deal
  27         18    0.0169221%    was in the
  28         18    0.0169221%    that i was
  29         18    0.0169221%    now and then
  30         18    0.0169221%    i had been
  31         17    0.0159819%    the end of
  32         17    0.0159819%    he was a
  33         17    0.0159819%    a sort of
  34         16    0.0150418%    was a good
  35         16    0.0150418%    that it was
  36         16    0.0150418%    she was a
  37         16    0.0150418%    rest of the
  38         16    0.0150418%    if i had
  39         16    0.0150418%    i was in
  40         16    0.0150418%    i wanted to
  41         16    0.0150418%    i said i
  42         16    0.0150418%    i could not
  43         16    0.0150418%    and so on
  44         16    0.0150418%    and so i
  45         15    0.0141017%    this was the
  46         15    0.0141017%    there is no
  47         15    0.0141017%    that is to
  48         15    0.0141017%    is to say
  49         15    0.0141017%    i did not
  50         15    0.0141017%    as much as
  51         14    0.0131616%    that was the
  52         14    0.0131616%    out of my
  53         14    0.0131616%    one of them
  54         14    0.0131616%    i was a
  55         14    0.0131616%    i had a
  56         14    0.0131616%    and he was
  57         14    0.0131616%    and began to
  58         13    0.0122215%    what do you
  59         13    0.0122215%    to make a
  60         13    0.0122215%    to be a
  61         13    0.0122215%    that there was
  62         13    0.0122215%    that is the
  63         13    0.0122215%    sort of thing
  64         13    0.0122215%    it had been
  65         13    0.0122215%    i knew that
  66         13    0.0122215%    he said he
  67         13    0.0122215%    end of the
  68         13    0.0122215%    by this time
  69         13    0.0122215%    at a time
  70         13    0.0122215%    as a rule
  71         12    0.0112814%    well it was
  72         12    0.0112814%    was not a
  73         12    0.0112814%    was in a
  74         12    0.0112814%    so i said
  75         12    0.0112814%    one of these
  76         12    0.0112814%    of course i
  77         12    0.0112814%    going to be
  78         12    0.0112814%    and all the
  79         11    0.0103413%    valley of holiness
  80         11    0.0103413%    to the earth
  81         11    0.0103413%    they had been
  82         11    0.0103413%    the valley of
  83         11    0.0103413%    that was a
  84         11    0.0103413%    that he was
  85         11    0.0103413%    that he had
  86         11    0.0103413%    of it and
  87         11    0.0103413%    it would have
  88         11    0.0103413%    in the kingdom
  89         11    0.0103413%    i tell you
  90         11    0.0103413%    for me to
  91         11    0.0103413%    for it was
  92         11    0.0103413%    down to the
  93         11    0.0103413%    at the end
  94         11    0.0103413%    and there was
  95         11    0.0103413%    all the time
  96         11    0.0103413%    a chance to
  97         10    0.0094011%    you want to
  98         10    0.0094011%    was out of
  99         10    0.0094011%    the first time
 100         10    0.0094011%    the cave and