「三日坊主」の意味と例文 https://noteolsen.com/2023/01/09/%e3%80%8c%e4%b8%89%e6%97%a5%e5%9d%8a%e4%b8%bb%e3%80%8d%e3%81%ae%e6%84%8f%e5%91%b3%e3%81%a8%e4%be%8b%e6%96%87/