Historical clue formulations

• Exercise in a pool — 2022-11-29
• Exercise in a swimming pool — 2022-11-27
• Practice swimming — 2022-10-25
• Exercise at a Y, maybe — 2021-04-10
• Practice swimming — 2019-01-29
• Exercise in a pool — 2017-02-27
• Exercise in a pool, say — 2014-05-17
• Exercise in a pool — 2013-02-02
• Swim in a pool — 2002-02-17