"Jihad: The forgotten obligation",
http://www.ummah.net.pk/harkat/jihad/o-jihad.htm

 Rank  Occurances  Percentage    1-tuple
       (of 36418)
   1       2814    7.7269482%    the
   2       1324    3.6355648%    of
   3       1025    2.8145423%    and
   4        765    2.1006096%    to
   5        656    1.8013070%    in
   6        609    1.6722500%    is
   7        600    1.6475369%    OPENPAREN
   8        594    1.6310616%    CLOSEPAREN
   9        493    1.3537262%    a
  10        454    1.2466363%    that
  11        438    1.2027020%    wasallam
  12        424    1.1642594%    NUMBER
  13        399    1.0956121%    he
  14        365    1.0022516%    prophet
  15        354    0.9720468%    for
  16        342    0.9390961%    allah
  17        331    0.9088912%    this
  18        296    0.8127849%    his
  19        292    0.8018013%    alayhi
  20        286    0.7853259%    sallallahu
  21        267    0.7331539%    will
  22        253    0.6947114%    it
  23        247    0.6782360%    i
  24        235    0.6452853%    was
  25        228    0.6260640%    be
  26        218    0.5986051%    said
  27        218    0.5986051%    from
  28        206    0.5656543%    you
  29        198    0.5436872%    with
  30        191    0.5244659%    they
  31        187    0.5134823%    jihaad
  32        184    0.5052447%    not
  33        165    0.4530727%    on
  34        165    0.4530727%    by
  35        158    0.4338514%    him
  36        158    0.4338514%    has
  37        157    0.4311055%    one
  38        156    0.4283596%    their
  39        153    0.4201219%    muslims
  40        146    0.4009007%    as
  41        141    0.3871712%    radhiallahu
  42        138    0.3789335%    who
  43        137    0.3761876%    bin
  44        136    0.3734417%    them
  45        132    0.3624581%    vol
  46        130    0.3569663%    which
  47        130    0.3569663%    when
  48        130    0.3569663%    have
  49        128    0.3514745%    anhu
  50        126    0.3459828%    are
  51        120    0.3295074%    so
  52        116    0.3185238%    sallallahu-alayhi
  53        113    0.3102861%    we
  54        108    0.2965566%    but
  55        105    0.2883190%    had
  56         99    0.2718436%    allahs
  57         98    0.2690977%    if
  58         96    0.2636059%    then
  59         95    0.2608600%    been
  60         93    0.2553682%    holy
  61         90    0.2471305%    taala
  62         90    0.2471305%    all
  63         89    0.2443846%    were
  64         88    0.2416388%    at
  65         86    0.2361470%    abu
  66         85    0.2334011%    muslim
  67         84    0.2306552%    reward
  68         84    0.2306552%    bukhari
  69         82    0.2251634%    or
  70         79    0.2169257%    people
  71         78    0.2141798%    person
  72         78    0.2141798%    an
  73         76    0.2086880%    narrated
  74         74    0.2031962%    would
  75         73    0.2004503%    o
  76         72    0.1977044%    shaheed
  77         72    0.1977044%    islam
  78         70    0.1922126%    wealth
  79         70    0.1922126%    there
  80         70    0.1922126%    jihad
  81         69    0.1894667%    these
  82         69    0.1894667%    radhiallahu-anhu
  83         66    0.1812291%    my
  84         65    0.1784832%    do
  85         64    0.1757373%    path
  86         63    0.1729914%    enemy
  87         61    0.1674996%    us
  88         61    0.1674996%    me
  89         60    0.1647537%    day
  90         59    0.1620078%    ibne
  91         59    0.1620078%    cause
  92         59    0.1620078%    can
  93         58    0.1592619%    used
  94         58    0.1592619%    some
  95         57    0.1565160%    no
  96         55    0.1510242%    saheeh
  97         55    0.1510242%    against
  98         53    0.1455324%    place
  99         53    0.1455324%    battle
 100         52    0.1427865%    your