Broken rhymes are rhymes wherein just one word is split across strains (commonly using a hyphen) to be able to enable it to be rhyme with One more word. That is fairly unheard of, but it isn't unheard of. With this poem, Dickinson adopts the rhyme scheme of ABCB in https://typesofpoemswithrhymes63849.ja-blog.com/27318105/5-simple-statements-about-types-of-rhymes-in-poems-explained