３件
How to write Japanese & Stroke order

Check also 件  

Names and idioms with total stroke of 6:
久之  生し  ヨ子  口巾  不卜  

Names and idioms similar to ３件:
件  条件文  神戸事件  四国艦隊下関砲撃事件  早稲田軍教事件  

Check stroke order for the words below:
才ノ元  山田沼又  渡里沢  椎矢  要覚  丑満時  双顎  楼下  公羊伝