Is the online IRP renewal instant?

I would be renewing my stamp 4, for the second time, as the spouse of an Irish national.

Please could you clarify how question 5.6 on Form 8 for naturalisation applies to an applicant of an Irish Spouse. Question 5.6: "Have you been absent from the State for more than 6 weeks per annum in any of the past 5 years?" Specifically my question is, when calculating the earliest eligibility da...