Some weeks might have 2 days off, some have 3 days off (average trips), some weeks have 4+ days off between work. Some months you end up with 6-10+ days off between two months transitioning, some months you might get 1 day off. Depends on what you bid, what you want, and seniority. Every line is different.

You can't have 14-15 days off 4day trip line with only 2 days off EVERY week. Obviously you get more days off than that. Look at a calendar and do the math with 15 days off in a month between 4 day trips.

You might have (4) 4days a month. Or (3) 4 days and a (1) 3 day or whatever. It varies.