How many days do rews stay out????

[weatherchick]

I know this will sound silly but.......

Are there any US domestic or supplemental carriers out there,
big boy jets only!, that have rules or contracts stating their
crews have go to home every 4 days or so?

Thanks everyone for any info you can provide!

[Gulfstreamaviator]

I leave my rew out all night

It is safer that way...