How long does it take a post to be removed from google?

Hi,I recently had a comment that defamed me on topix removedHowever when you google my name it still comes up despite the comment not being there when

Hi,
I recently had a comment that defamed me on topix removed
However when you google my name it still comes up despite the comment not being there when I click the link.
Is this because of googles cached websites?
If so how long would it take for this to be removed?

or:Hi,I recently had a comment that defamed me on topix removedHowever when you google my name it still comes up despite the comment not being there when I click the link.Is this because of googles cached websites?If so how long would it take for this to be removed?

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