instruction: how many times did patient 016-30273 get -lymphs tested until 22 months ago?
response: SELECT COUNT(*) FROM lab WHERE lab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '016-30273')) AND lab.labname = '-lymphs' AND DATETIME(lab.labresulttime) <= DATETIME(CURRENT_TIME(), '-22 month')