###HUMAN: calculate how many times patient 19627 received a laboratory test for potassium until 01/2103., ###ASSISTANT: SELECT COUNT(*) FROM labevents WHERE labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'potassium') AND labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 19627) AND STRFTIME('%y-%m', labevents.charttime) <= '2103-01'