https://adwords.google.com/select/KeywordToolExternal Is "Apporx Avg Search Volume" the amount of searchs that keyword gets per month on average?
From my understanding, the approx avg search vol column indicates the search vol (average) per month for the previous 12 months. Hope that helps!
My Dear Brothers and Sisters This means "This column shows the approximate average monthly number of search queries matching your keywords that were performed on Google and the search network over a recent 12-month period. This number is specific to your targeted country and language as well as your selection from the Match Type drop-down menu.