Obviously a 3-year interregnum would not end the perpetual succesion, nor a 5-year, nor one that lasts 7 years, 6 months, 3 days, 5 hours, 43 minutes, and 52 seconds. There's no way theologically to put an arbitrary TIME limit to it.
This is a textbook strawman. The limit is when all Papally appointed Bishops die. Bishops are Appointed or Consecrated around 35 and if they die around 80, that's around 45 years. There'll be outliers, so you can add 5 to 10 years at most. Beyond that is plainly ridiculous.
We're also clearly not in 3 year or 5 year or 7 year territory anymore. That ship sailed long long ago. Again, the fact that no prominent sedevacantist group at all even tried contacting these "last remaining jurisdictional Bishops" speaks volumes about how little even they believe their own position.
As for you, Liarslaus, you're just going to keep lying about others and about the Truth. Anyone who tries to enlighten you is to be pitied. You know, deep down, that you are the schismatic. That alone could explain your bizzare behavior and your ridiculous accusations.