I'm not an english native speaker, so maybe I'm wrong but I always took "burned at the stake" as an expression for punishment which lead to death, not as the person was literally burned at a stake.
But, as I said, I might be wrong.
But, as I said, I might be wrong.
(source: native Englishman)
Being hung, drawn, and quartered meant literally "Convicts were fastened to a hurdle, or wooden panel, and drawn by horse to the place of execution, where they were hanged (almost to the point of death), emasculated, disembowelled, beheaded and quartered (chopped into four pieces)."
https://en.m.wikipedia.org/wiki/Hanged,_drawn_and_quartered
Others are included in a more general article on capital punishments:
https://en.m.wikipedia.org/wiki/List_of_methods_of_capital_p...