Divide according to words or phrases. Generally speaking, a single word or phrase with similar meaning is a rhythm. The so-called similarity means that you can't open it. If you read it apart, it will sound incoherent and lack the rhythm of poetry.
Divide according to meaning. Generally speaking, a word or phrase with relatively independent meaning is a rhythm. The so-called relative independence means that you can express a meaning in a poem alone.
Divide by combining words, phrases and meanings. This method is the synthesis of the above two methods, and it is also the most practical. Because in a specific poem, you will encounter all kinds of situations. Therefore, only by combining the three methods can you divide the rhythm conveniently.