Frequencies for first 10,000 rows of dose_freq variable in drug2012q4 dataset :

 Code for Frequency |      Freq.     Percent        Cum.
--------------------+-----------------------------------
                    |      7,354       73.54       73.54
             /cycle |          7        0.07       73.61
                /hr |          8        0.08       73.69
             /month |        151        1.51       75.20
                /wk |        286        2.86       78.06
                /yr |          1        0.01       78.07
                 1X |          3        0.03       78.10
                BID |        442        4.42       82.52
                BIW |         18        0.18       82.70
               Q12H |         25        0.25       82.95
                Q2H |          1        0.01       82.96
                Q2W |          2        0.02       82.98
                Q3W |         50        0.50       83.48
                Q4H |          6        0.06       83.54
                Q6H |          5        0.05       83.59
                Q8H |          7        0.07       83.66
                 QD |      1,325       13.25       96.91
                QID |         33        0.33       97.24
                 QM |          1        0.01       97.25
                QOD |         17        0.17       97.42
                QOW |         68        0.68       98.10
                TID |        159        1.59       99.69
                TIW |          8        0.08       99.77
             UID/QD |          3        0.03       99.80
                 X1 |         20        0.20      100.00
--------------------+-----------------------------------
              Total |     10,000      100.00

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