how many times had patient 17462 had an intake of ns w/40 kcl since 05/17/2104?
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 = 17462 ) ) and inputevents_cv.itemid in ( select d_items.itemid from d_items where d_items.label = 'ns w/40 kcl' and d_items.linksto = 'inputevents_cv' ) and strftime('%y-%m-%d',inputevents_cv.charttime) >= '2104-05-17'