More specifically the absence rules. I can only find something that says no more than 180 days but im sure i read ages ago it theres a cap in the 5 years for total days.
That is only for people on certain visas (i.e. Tier 2 work visas)... it does not apply to people on spousal visas/FLR(M).
For you, there is no residency requirement for ILR, other than having lived together as a couple for the whole time (same as for FLR(M)).
For citizenship, assuming you are still married to a UK citizen when you apply, you have to meet the following residency requirements:
- you hold ILR
- you were physically inside the UK on the same date exactly 3 years prior to your citizenship application date
- you have not been outside the UK for more than 270 days in the last 3 years
- no more than 90 of those 270 days can have been in the last 12 months before applying for citizenship