These are comics I'm reading rarely. Maybe once a month, maybe every few months, maybe a few times a year...
Most dates are of the last strip read, not the exact date of reading.
Red String Upto: Chp. 30, Pg. 5
By chapter:
Sleepless Domain Upto: 2023-09-11 (Chp. 21)
Sins: Venials Upto: 2014-11-02 (F1,1458)
Gaia Upto: 2014-09-07 (Breaking All Barriers Cover)
Weregeek Upto: 2018-12-05 (Chrn. 2, Chp. 15)
Sidekick Girl Upto: 2021-02-03 (Containment VI)
Sister Claire Upto: 2015-07 (Book 2, Chp. 7, Shadows, 461)
Power Nap Upto: 2013-10 (Chp. 5)
Darths & Droids Upto: 1192 (Movie VI)
Slightly Damned Upto: 2016-07-26 (Part Nine / 758)
Girl Genius Upto: 2017-07-14 (Act 2, Book 5 / Vol 18)
Spinnerette Upto: 2018-02 (Iss. 26, Power Swap Part 2)
Now and then:
Sandra and Woo Upto: 2022-07-08 (1338)
Full Frontal Nerdity Upto: 2024-02-16
ChaosLife Upto: Happy Homes, 2023-02-28
No Pink Ponies Upto: 2018-03-10
CRFH Upto: 2012-09-07 (Story 2, Pg. 19)
Tales of the Questor Upto: 2015-?? (704+11)
Between Failures Upto: 2507 Beary Tragic, 2023-04-24
Ginger's Bread Upto: 503, 2015-11-30
JL8 Upto: 269, 2019-??
Quiet:
Count Your Sheep Upto: 2011-12-07 (2013-11-30)
Intragalactic Upto: 213, Chp. 11 (2014-10-23)
Head Trip Upto: 2015-08-10

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Testing:
Rubi Whipple Upto: Chp 4, The First Shard (Pg. 57, 2018-01-23)
Namesake Upto: Chp. 17, Breaking Free, 2013-12-19
Ménage à 3 Upto: Volume 6, 2014-06-17
Unsounded Upto: Chapter 09: The Deadly Nevergreen
ToDo:
Stand Still. Stay Silent
Erfworld Upto: Book 2 end, 114. Book 0, apprx. Ep. 056
Sorcery 101 Upto: 2010-04-12 (Chp. 19)
Nodwick Upto: 2010-11-15 (#20)
Zap! Upto: 2011-03 / 520
Peter is the Wolf Upto: 2008-12-10 (138)
Alpha Shade Upto: 051212 (125)
Chibi Cheerleaders from Outer Space Upto: End of Chapter 5.5
Suburban Jungle Upto: 2008-07
Krakow (2 & marilith) Upto: 2005

Quite rarely:
WIGU Upto: 2007
Quieter:
Yamara
Eversummer Eve
greeneyes
Penance (3-43)
Bruno the Bandit Upto: 2009-10-23
Probably ended:
Loserz Waiting for Bob(2002) Zed(2002) meekerz(2005) Limpidity(520)
Zwol(2003-01-20) Lethal Doses Winter(2004-08-05?/88) PiggyHunter(101)
mmob(2009-01-26)
Ended:
RPG World Life of Riley Crap I Drew on My Lunch Break Striptease Quiltbag(150) Schlock Mercenary (2020-07-27)

Gone?

Weekly Comics Comics I don't follow (currently)