preferred_name: At least once per year, but not every month (i.e., 10 or fewer in past 12 months)
preferred_name_lc: at least once per year, but not every month (i.e., 10 or fewer in past 12 months)
label: At least once per year, but not every month (i.e., 10 or fewer in past 12 months)
label_lc: at least once per year, but not every month (i.e., 10 or fewer in past 12 months)