instruction: calculate how many times since 2105 patient 9241 has received the insert endotracheal tube procedure.
response: SELECT COUNT(*) FROM procedures_icd WHERE procedures_icd.icd9_code = (SELECT d_icd_procedures.icd9_code FROM d_icd_procedures WHERE d_icd_procedures.short_title = 'insert endotracheal tube') AND procedures_icd.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 9241) AND STRFTIME('%y', procedures_icd.charttime) >= '2105'