Frequencies for first 10,000 rows of dose_freq variable in drug2017q4 dataset :

   Code for |
  Frequency |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      6,176       61.76       61.76
     /cycle |         19        0.19       61.95
        /hr |          5        0.05       62.00
     /month |        113        1.13       63.13
        /wk |        331        3.31       66.44
        /yr |          4        0.04       66.48
         1X |         18        0.18       66.66
        BID |        643        6.43       73.09
        BIW |         17        0.17       73.26
       Q12H |         47        0.47       73.73
        Q3H |          1        0.01       73.74
        Q3W |         56        0.56       74.30
        Q4H |         12        0.12       74.42
        Q6H |         11        0.11       74.53
        Q8H |          9        0.09       74.62
         QD |      2,145       21.45       96.07
        QID |         29        0.29       96.36
        QOD |         28        0.28       96.64
        QOW |        123        1.23       97.87
        TID |        206        2.06       99.93
        TIW |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 19 Jun 2018