- 3カ月ごとに
- quarterly: quarterly n. 季刊物.【形容詞 名詞+】The results of the survey were published in an influential quarterly.調査結果は有力な季刊誌に発表されたleading quarterlies一流の季刊誌a literary quarterly文芸季刊誌a prestigious quarterly有名季刊誌a scient
- a quarterly (magazine): a quarterly (magazine)季刊雑誌きかんざっし季刊誌きかんし
- at quarterly intervals: 年に4回