http://oniongenqviig2chcaxtdc4spi4lrvhe3akf3676vhisauvtqsruhhqd.onion
If you want a .onion address which starts or ends with specific characters or words it needs billions of attempts, which consume much cpu power. As longer the desired characters are, as longer it takes. How long can that take? That depends on the power of the CPU. A regular mid to high end CPU like the i7-9700K can generate about 40,000,000 addresses per second.