'perpetual motion' used in domains:
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perpetualmotionmachine.com
perpetualmotionmusic.com
perpetualmotioncat.com
perpetualmotionblueprint.com
perpetual-motion-marketing.com
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perpetual-motion-production.com
perpetual-motion-travel.com
the-secret-perpetual-motion-of-money.com
perpetual-motion-machines.com
Statistical data
"perpetual motion" has the frequency of use of 0.0001% on en.wikipedia.org.
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