"Life on the Mississippi", by Mark Twain

 Rank  Occurances  Percentage    3-tuple
       (of 130307)
   1        120    0.0920902%    NUMBER NUMBER NUMBER
   2         77    0.0590912%    of the river
   3         66    0.0506496%    one of the
   4         61    0.0468125%    out of the
   5         50    0.0383709%    it was a
   6         46    0.0353013%    it is a
   7         44    0.0337664%    by and by
   8         40    0.0306967%    he was a
   9         38    0.0291619%    there was a
  10         34    0.0260922%    of the mississippi
  11         34    0.0260922%    it was the
  12         31    0.0237900%    a couple of
  13         29    0.0222551%    the end of
  14         27    0.0207203%    the river and
  15         27    0.0207203%    the head of
  16         27    0.0207203%    i was a
  17         27    0.0207203%    end of the
  18         26    0.0199529%    side of the
  19         25    0.0191855%    to be a
  20         25    0.0191855%    part of the
  21         24    0.0184180%    used to be
  22         24    0.0184180%    two or three
  23         24    0.0184180%    to new orleans
  24         24    0.0184180%    the middle of
  25         24    0.0184180%    i did not
  26         24    0.0184180%    i could not
  27         24    0.0184180%    down the river
  28         23    0.0176506%    there is a
  29         23    0.0176506%    that it was
  30         23    0.0176506%    hundred and fifty
  31         23    0.0176506%    here and there
  32         22    0.0168832%    there was no
  33         22    0.0168832%    on the river
  34         22    0.0168832%    in new orleans
  35         22    0.0168832%    a good deal
  36         21    0.0161158%    that he was
  37         21    0.0161158%    now and then
  38         21    0.0161158%    it was not
  39         21    0.0161158%    in the middle
  40         20    0.0153484%    the united states
  41         20    0.0153484%    in the world
  42         19    0.0145810%    up to the
  43         19    0.0145810%    the old man
  44         19    0.0145810%    the hurricane deck
  45         19    0.0145810%    that he had
  46         19    0.0145810%    of all the
  47         19    0.0145810%    new orleans and
  48         19    0.0145810%    but it is
  49         18    0.0138135%    was going to
  50         18    0.0138135%    up the river
  51         18    0.0138135%    the mouth of
  52         18    0.0138135%    but it was
  53         18    0.0138135%    and it was
  54         17    0.0130461%    would have been
  55         17    0.0130461%    the first time
  56         17    0.0130461%    one of those
  57         17    0.0130461%    of new orleans
  58         17    0.0130461%    mouth of the
  59         17    0.0130461%    it seemed to
  60         17    0.0130461%    it is the
  61         17    0.0130461%    at the end
  62         16    0.0122787%    up in the
  63         16    0.0122787%    to me that
  64         16    0.0122787%    middle of the
  65         16    0.0122787%    it would be
  66         16    0.0122787%    i dont know
  67         16    0.0122787%    he had been
  68         16    0.0122787%    at the head
  69         16    0.0122787%    as soon as
  70         16    0.0122787%    and a half
  71         16    0.0122787%    all the way
  72         15    0.0115113%    was on the
  73         15    0.0115113%    two hundred and
  74         15    0.0115113%    there is no
  75         15    0.0115113%    the river is
  76         15    0.0115113%    out of it
  77         15    0.0115113%    ought to be
  78         15    0.0115113%    one of these
  79         15    0.0115113%    on account of
  80         15    0.0115113%    of the water
  81         15    0.0115113%    in front of
  82         15    0.0115113%    i had been
  83         15    0.0115113%    head of the
  84         15    0.0115113%    from new orleans
  85         15    0.0115113%    at the wheel
  86         15    0.0115113%    and it is
  87         15    0.0115113%    a sort of
  88         14    0.0107439%    when i was
  89         14    0.0107439%    when he was
  90         14    0.0107439%    was in the
  91         14    0.0107439%    three or four
  92         14    0.0107439%    the river in
  93         14    0.0107439%    the rest of
  94         14    0.0107439%    the mississippi river
  95         14    0.0107439%    the fact that
  96         14    0.0107439%    that i was
  97         14    0.0107439%    that i had
  98         14    0.0107439%    seemed to me
  99         14    0.0107439%    one or two
 100         14    0.0107439%    of it and