"The Land That Time Forgot", by Edgar Rice Burroughs

 Rank  Occurances  Percentage    1-tuple
       (of 37338)
   1       2452    6.5670363%    the
   2       1417    3.7950613%    and
   3       1168    3.1281804%    i
   4       1116    2.9889121%    of
   5        928    2.4854036%    to
   6        824    2.2068670%    a
   7        577    1.5453425%    was
   8        541    1.4489260%    that
   9        509    1.3632225%    we
  10        478    1.2801971%    it
  11        453    1.2132412%    in
  12        436    1.1677112%    had
  13        319    0.8543575%    as
  14        317    0.8490010%    my
  15        310    0.8302534%    for
  16        296    0.7927580%    me
  17        283    0.7579410%    with
  18        258    0.6909851%    he
  19        245    0.6561680%    but
  20        242    0.6481333%    her
  21        233    0.6240291%    were
  22        224    0.5999250%    at
  23        223    0.5972468%    she
  24        191    0.5115432%    us
  25        189    0.5061867%    from
  26        178    0.4767261%    upon
  27        172    0.4606567%    which
  28        172    0.4606567%    not
  29        170    0.4553002%    have
  30        167    0.4472655%    all
  31        165    0.4419090%    his
  32        161    0.4311961%    our
  33        155    0.4151267%    there
  34        150    0.4017355%    been
  35        145    0.3883443%    on
  36        142    0.3803096%    one
  37        141    0.3776314%    you
  38        140    0.3749531%    they
  39        131    0.3508490%    by
  40        129    0.3454925%    then
  41        121    0.3240666%    be
  42        120    0.3213884%    into
  43        112    0.2999625%    is
  44        108    0.2892496%    when
  45        108    0.2892496%    could
  46        105    0.2812148%    or
  47        104    0.2785366%    an
  48        102    0.2731801%    this
  49        102    0.2731801%    him
  50         98    0.2624672%    them
  51         97    0.2597890%    so
  52         90    0.2410413%    up
  53         86    0.2303284%    would
  54         86    0.2303284%    out
  55         86    0.2303284%    no
  56         86    0.2303284%    about
  57         85    0.2276501%    toward
  58         81    0.2169372%    than
  59         81    0.2169372%    down
  60         81    0.2169372%    deck
  61         78    0.2089025%    what
  62         78    0.2089025%    its
  63         78    0.2089025%    did
  64         76    0.2035460%    water
  65         74    0.1981895%    saw
  66         73    0.1955113%    more
  67         73    0.1955113%    man
  68         71    0.1901548%    time
  69         71    0.1901548%    now
  70         70    0.1874766%    came
  71         68    0.1821201%    two
  72         66    0.1767636%    after
  73         64    0.1714071%    some
  74         64    0.1714071%    said
  75         63    0.1687289%    men
  76         62    0.1660507%    their
  77         61    0.1633724%    who
  78         60    0.1606942%    are
  79         59    0.1580160%    lys
  80         59    0.1580160%    bradley
  81         57    0.1526595%    must
  82         57    0.1526595%    before
  83         56    0.1499813%    though
  84         56    0.1499813%    olson
  85         56    0.1499813%    if
  86         56    0.1499813%    girl
  87         55    0.1473030%    might
  88         55    0.1473030%    NUMBER
  89         54    0.1446248%    first
  90         53    0.1419465%    will
  91         53    0.1419465%    von
  92         53    0.1419465%    schoenvorts
  93         53    0.1419465%    only
  94         52    0.1392683%    nobs
  95         51    0.1365901%    thing
  96         51    0.1365901%    other
  97         51    0.1365901%    face
  98         51    0.1365901%    come
  99         50    0.1339118%    do
 100         49    0.1312336%    while