Residency Requirements

What are the actual requirements for green card holders planning on being outside of the US for an extended period of time?

The official website says 1-year, but I keep hearing people mention 6 months, the USCIS website says the following:

Your Permanent Resident Card becomes technically invalid for reentry into the United States if you are absent from the United States for 1 year or more.

My questions are; what do they mean exactly? 1 year consecutive? Could you leave for 9 months, return for 3 days and depart again for 6 to 9 months?

Thanks,

submitted by /u/ADA-World
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source https://www.reddit.com/r/immigration/comments/rco1ld/residency_requirements/