The ‘grind’ is 5 on/2 off, for training and also if they’re commuting to reserve which is common as a new hire.
At the majors on reserve you’ll have 12-13 days a month off. In some situations he can sit reserve at home even if he’s commuting. That’s why not commuting, especially on reserve is such a good deal, because every day you’re not used on reserve is an additional day off at home.