instruction: count the number of times patient 025-30850 had received endotracheal tube - insertion.
response: SELECT COUNT(*) FROM treatment WHERE treatment.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '025-30850')) AND treatment.treatmentname = 'endotracheal tube - insertion'