C'est qui que?

Question

So I was just listening to Monsieur Grognon in the listening exercise and then I read the transcript.  In the second paragraphe there is this phrase:
«D’ailleurs, il n’a pas eu de conversation avec qui que ce soit
depuis des années. . . .» I recalled from the lesson above that the «c'est qui que» is grammatically incorrect.  So, exactly how frequent is this phrase used in everyday French?
Merci en avance.

Accepted Answer

Bonjour Ron !Actually here the phrase is qui que ce soit, which literally means "who[m] who might be" and is used in the sense of any/no body whatsoever :)You can also use quoi que ce soit = any/no thing whatsoeverI hope that's helpful!Bonne journée !

Answer

Ah.  I see the difference.  I am familiar with quoi que ce soit, but have never run across, in my readings, qui que ce soit.
Merci, Aurélie. J'ai appris quelque chose nouvelle.
Bonne journée.