一度
ichido
once
Example sentences
彼は必ず月に一度両親に手紙を書く。
He never fails write to his parents once a month.
彼は二ヶ月に一度、必ず両親に手紙を書くことにしている。
He makes a point of writing to his parents once every two months.
彼は少なくとも週に一度車を洗う。
He washes his car at least once a week.