April come she will

[Falgoní]

"April come she will". This is the title of a Simon and Garfunkel song. The structure of the sentence surprised me. I had never heard it. There is another sentence in the song with the same structure: "August, die she must". I gess it is an hyperbaton but I would like to know how rare it is, how frequently is used in poetry, if it is used in prose or in every day speech, if it is used in contemporary literature or it was only used in the past. I give the complete sentences to have the context:

"April come she will
When streams are ripe and swelled with rain"

"August, die she must,
The autumn winds blow chilly and cold"

[Romanovich]

It doesn't seem to be an hyperbaton, in the sense of words that naturally belong together are separated from each other for emphasis or effect. In the song, the words are not linked through the meaning. It is just about rhyme :
april = will
may = stay
june = tune
july = fly
august = must
september = remember
To me it closer to anastrophe (an inversion of the natural order of words) than a hyperbaton.

A famous example of hyperbaton is the way Yoda speaks in Star Wars.