If I understand you correctly, no it's not less if your break is shorter. If you miss more than one pill in the 7 days after a break, no matter the length, you are still unprotected. This is because you need 7 consecutive pills to protected. So if you take at least 7 pills, then take a break (of any length) that interrupts the streak of 7 consecutive pills. So while you're still protected after a break (you don't have to wait for 7 pills to be protected again) if you take ANOTHER break before getting those 7 pills, like missing 2 or more, you would not be protected.