The same car mod term in the 50s was ‘hotrodding’.

Once fully frozen, it’s not really able to be saved.

Is it a full freeze? Press CAPS-LOCK or NUM-LOCK to see if the hardware is still responding.

If it is, it might just be a DE freeze. Try to SSH into into your frozen device, from another PC or phone.

Or press CTRL-ALT-F7 to see if you can switch to a terminal and login.

Once in, use ps -ef, or top to see and kill what might be causing a freeze.

Turn on auto-save in LibreOffice(you usually only lose a sentence or 3 words with this on).

Investigate IDEs with auto-backup or an autosaved change-history.

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To diagnose whether you have bad RAM, boot from a LiveUSB distro and use it for a day or week.

If no freezes, reinstall a fresh OS.

If it still freezes, get new RAM, or replace whole PC/laptop.