Veronica has plans. To travel the world, rescue animals, and design clothing. Getting pregnant doesn't fit in that plan. So she uses birth control every time.
Veronica started with condoms, then added a diaphragm for back up. Knowing diaphragms do their best work with the help of spermicide, she always uses that, too. So every time she has sex, it's one, two, three methods.
Using all three is easy for Veronica, in part because the diaphragm can go in hours before having sex. Or it can go in 3 seconds before. You don't have to have a "sex schedule"; you just have to have a plan.
You don't need to have some sort of "sex schedule."