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is 'wander off' a valid English phrase?

i see the meaning of 'wander away' is 'to go off course'. do 'wander away' and 'wander off' mean the same thing? if not, what is the meaning of 'wander off'?
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Yes and yes.
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According to Google's hit-count, "off" is used about ten times as often as "away".
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Comments  
thanks a lot Mister Micawber and Philip. I don't rely on google that much though, because most people - while writing on the internet - don't check their grammer (i too find it unnecessary). i asked the question because i've found 'wander away' in m-w but not 'wander off'.
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