How much time outside Norway is allowed while qualifying for citizenship?

The residence requirement is about continuous residence, so long absences abroad can break or reduce the time that counts. As a general rule you may not have been outside Norway for more than two months in any single calendar year during the qualifying period.

Similarly, you should not have been without a valid residence permit for more than a short total period during those years. Because each trip can affect your eligibility, keep records of your travel and check the exact limits before applying.