Is the word "Zamhareer" (intense cold) accurately mentioned in the aforementioned supplication, and does Hell contain cold by this name?

Al-Zamhareer: The extreme cold. It is a type of torment in Hellfire with which the disbelievers are punished. Al-Bukhari and Muslim reported that Hellfire complained to its Lord, so He permitted it two breaths: one in winter and one in summer. Thus, the most extreme heat they experience and the most extreme cold (zamhareer) they experience are from it.

And Allah Almighty knows best.