count the number of times that in 02/this year patient 20000 had taken tube feeding.
select count(*) from inputevents_cv where inputevents_cv.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 20000 ) ) and inputevents_cv.itemid in ( select d_items.itemid from d_items where d_items.label = 'tube feeding' and d_items.linksto = 'inputevents_cv' ) and datetime(inputevents_cv.charttime,'start of year') = datetime(current_time,'start of year','-0 year') and strftime('%m',inputevents_cv.charttime) = '02'