Historical clue formulations

• Tedious trials — 2025-08-08
• Double shifts at work, e.g. — 2020-06-27
• Difficult journeys — 2019-12-20
• Long, tiring jobs — 2018-05-28
• Laborious tasks — 2018-03-29
• Grinds — 2016-05-06
• Trudges (through) — 2015-06-29
• Trudges (through) — 2013-10-31
• Hard, boring efforts — 2010-09-26
• Arduous travels — 2010-07-11
• Drudges — 2006-03-21
• Walks heavily — 2004-12-19
• Wades (through) — 2004-07-05
• Plods along — 2002-05-28
• Trudges (through) — 1997-02-24