to truant/ to skip school/ Professionals, please help. Thank you

[Alexandro]

If a student doesn't go to school without permission, what do you say?

- He or she truants school or He or she skips school. Which one of these is mostly used.

I've found a few other sentences:

- They have been truanting school a lot.
- She truanted from school twice a week.

Is 'to truant' old-fashioned? If you have more information I would be very grateful.

Thanks
Alexandro
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'Everyone can mistakes! After all, nobody's perfect.'

[Mister Micawber]

'She plays truant' is OK. Or 'She skips school'.
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Native English teacher at Mister Micawber's

[Alexandro]

Thank you, Mister Micawber
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'Everyone can mistakes! After all, nobody's perfect.'