instruction: how many times patient 75170 has received remov imp dev-tib/fibula during their last hospital encounter?
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 = 'remov imp dev-tib/fibula') AND procedures_icd.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 75170 AND NOT admissions.dischtime IS NULL ORDER BY admissions.admittime DESC LIMIT 1)