>>538485941
About how many of Freeza’s race are there? Are they quite thriving, with a big population?
Freeza is what you might call a mutated life-form. Strictly speaking, Freeza’s father is a mutant with an abnormally high battle power. And, born from his father alone, still in strong possession of the mutant traits, was Freeza. Accordingly, even saying “Freeza’s race”, these two are the only ones who possess an abnormal [level of] battle power and cruelty.
>Toriyama Interview (Saikyo Jump)
There. Plain and simple. Freeza and King cold are both mutants of there race. The other interview says the mutation began around King Cold's father's generation. Therefore we can assume it began with Freeza's grandfather.
Kuriza (who will be born from Freeza + Macki TRUST) will be an even bigger mutant than Freeza judging how Freeza is a bigger mutant than his father.