Frequencies for s5_c4_4 variable in hcris2552_10_2010 dataset :

       capd |
  exchanges |
    per day |
    s500000 |
00400 00400 |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |          1        0.04        0.04
          4 |         17        0.73        0.78
          5 |          6        0.26        1.03
         10 |          1        0.04        1.08
          . |      2,297       98.92      100.00
------------+-----------------------------------
      Total |      2,322      100.00

by Jean Roth , jroth@nber.org , 23 Aug 2018