３件
How to write Japanese & Stroke order

Check also 件  

Names and idioms with total stroke of 6:
二夫  正し  下口  比い  伃  

Names and idioms similar to ３件:
人件費  仮定条件  火薬陰謀事件  十分条件  帝銀事件死刑囚  

Check stroke order for the words below:
畷  千花里  尾川甲  美奈瑠  普一  相猜疑  人口静態