All that can presently (March 2021) be gleaned about Miss Frankie Milton from sheet music covers and by Internet searching is that she has been featured on on just one work namely Johnny's Got the Shutters Up (1891) music by Orlando Powell, words by J. P. Harrington and published by Francis, Day & Hunter, London W.C.2, England.
She is listed as a "Light Comedienne and Dancer" in a playbill for the Argyle Theatre of Varieties, Birkenhead dated 22nd April, 1895.
Surfers are welcome to contribute any further information about this performer.