Clarification of Absences -- 180 per year? (TIer 1)

[nafe12]

Is the absence limit 180 days in TOTAL over a 5 year Tier 1 (G), or up to 180 per year.

I'm finding conflicting interpretations of the following:

No more than 180 whole days absence are allowed in any of the five, four, three or two consecutive 12 month periods, depending on the category, preceding the date of the application for indefinite leave to remain (ILR)

(The wording to me suggests 180/year)

[UKBALoveStory]

up to 180 per year

[nafe12]

That's how I read it too.
Makes sense, given 180 days means you're tax resident...

[nananu]

Hi,
Then what about the current year(I mean year-1). 180 DAYS is applicable to year-1 as well?