Frequencies for first 10,000 rows of vdayr variable in nhamcsopd2004 dataset :

day of week |
   of visit |      Freq.     Percent        Cum.
------------+-----------------------------------
     sunday |        111        1.11        1.11
     monday |      2,061       20.61       21.72
    tuesday |      2,047       20.47       42.19
  wednesday |      2,140       21.40       63.59
   thursday |      1,901       19.01       82.60
     friday |      1,608       16.08       98.68
   saturday |        132        1.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016