1
this and that;this or that;one thing or another;this way and that
クラス会に出席して、昔懐かしい学生時代の思い出があれこれとよみがえった。
Our class reunion brought back old memories of when we were students.
2
only applies to
かれこれ
around;about;round about;roughly;nearly;almost
もうかれこれ１０時です。
It is almost ten o'clock.
Other forms
彼此 【あれこれ】 (rarely used kanji form)