It should be noted this practice is largely, though not entirely, limited to Shia Islam. Quite rare among Sunnis, at least in formal terms with a preset date of termination of the marriage.
BTW, what up with this stuff about polygamy being "rare" among Jews?
Being monogamous and a Gentile, I wouldn't have a clue one way or another.
My guess is that he's probably talking about contemporary Jews, to the exclusion of Old Testament kings.