FM / timers.target.wants

/snap/core20/2866/usr/lib/systemd/system/timers.target.wants/

/snap/core20/2866/usr/lib/systemd/system/timers.target.wants

Name	Size	Mode	Actions
apt-daily-upgrade.timer	184	0644	edit dl rm
apt-daily.timer	156	0644	edit dl rm
e2scrub_all.timer	251	0644	edit dl rm
fstrim.timer	205	0644	edit dl rm
systemd-tmpfiles-clean.timer	490	0644	edit dl rm

Edit: /usr/lib/systemd/system/fstrim.timer (205B)

[Unit] Description=Discard unused blocks once a week Documentation=man:fstrim ConditionVirtualization=!container [Timer] OnCalendar=weekly AccuracySec=1h Persistent=true [Install] WantedBy=timers.target