Frequencies for first 10,000 rows of dose_freq variable in drug2015q2 dataset :

   Code for |
  Frequency |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,428       64.28       64.28
        /hr |          2        0.02       64.30
       /min |          2        0.02       64.32
     /month |        141        1.41       65.73
        /wk |        380        3.80       69.53
        /yr |          3        0.03       69.56
         1X |          9        0.09       69.65
        BID |        583        5.83       75.48
        BIW |         21        0.21       75.69
       Q12H |         19        0.19       75.88
        Q2H |          2        0.02       75.90
        Q3W |         36        0.36       76.26
        Q4H |         11        0.11       76.37
        Q6H |         21        0.21       76.58
        Q8H |          9        0.09       76.67
         QD |      1,949       19.49       96.16
        QID |         44        0.44       96.60
        QOD |         15        0.15       96.75
        QOW |        132        1.32       98.07
         QW |          3        0.03       98.10
        TID |        181        1.81       99.91
        TIW |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Apr 2017