count how many times patient 30976 has received a entral infus nutrit sub procedure in their first hospital encounter.
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 = 'entral infus nutrit sub' ) and procedures_icd.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 30976 and admissions.dischtime is not null order by admissions.admittime asc limit 1 )