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[–] 1 point 1 day ago*

Our friend provided this link: https://history.house.gov/Institution/Majority-Changes/Majority-Changes/

I think the intro answers it:

the House has changed majorities in a midterm election a little more than one-third of the time. But of the total 19 House majority changes in that time span, including presidential and midterm election years, more than three-quarters have occurred during a midterm.

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