They’ve tracked these tetrads ... and they are rare, and especially in context with the Jewish Festivals .
If you want to, you can easily track them in the past, all the way out into the future, using NASA’s information, and see how rare they are.
I would have to look up the precise definition for a tetrad, but it’s something like four consecutive eclipses, with no partials n between, and I think it’s supposed to be separated by six months apart. But, again, I would have to look up the precise definition.
What do traditional Christians think of using astrology (not just celestial mechanics) to anticipate Jesus’ return?