３件
How to write Japanese & Stroke order

Check also 件  

Names and idioms with total stroke of 6:
好  八戸  大上  弓下  J太  

Names and idioms similar to ３件:
民事事件  機能要件  京大事件  共和演説事件  尼港事件  

Check stroke order for the words below:
照峯  燐酸  堅聖  菅脇  裏鋩子  和国橋  天宏  知那美