Since there's no updates on the enhancement request raised by @DavidJarvie on the KAlarm Project, documented in my previous question over here: https://askubuntu.com/a/257843/9598, I started wondering if is it there a scheduler whose features preferably includes (and perhaps "only includes") a text user interface.
I have tried CRON to schedule my tasks but, as they are too many (hundreds of commands a day), in certain cases CRON isn't running some of them. But, if there is a proficient CRON Text User Inteface which offers at least some of the KAlarm features, it will be welcome.
Here's a screenshot of what I find in KAlarm's GUI and which I would like to find in a TUI.

The reason for this need is that SSH support is needed for this task, which can't be solved efficiently via GUI. What I do right now is to Remote Desktop the Server in order to do the scheduling.
Thanks in advance.
@muru has ponted in a comment to the at command. Which seems good but it clearly states in the at's man page:
3. To have a job reschedule itself, at can be invoked from within the at-job. For example, this daily processing script named my.daily runs every day (although crontab is a more appropriate vehicle for such work): # my.daily runs every day daily processingat now tomorrow < my.daily
I have mentioned before that I won't use CRON anymore for this task, so I guess a standalone text mode application will be more suitable for the scheduling case. Thank you very much @muru!