In the United Kingdom, she held the title of Princess with the style Her Highness as a male-line great-granddaughter of King George III.

[1] These plans came to nothing as tensions grew between Hanover and Prussia finally resulting in the Austro-Prussian War (14 June – 23 August 1866).

Eventually, the family settled at Gmunden in Austria, where they owned Schloss Cumberland (named for the British Ducal title held by Frederica's father).

Frederica, however, was in love with Baron Alfons von Pawel-Rammingen (1843–1932), the son of a government official of the Duchy of Saxe-Coburg and Gotha.

In August 1881 she established the Convalescent Home, an institution for poor women who have given birth but have been discharged from maternity hospitals.

[17] Frederica was interested in children and became patron of the Church Extension Association, then based in Kilburn, which wished to set up schools in Willesden, then a new suburb of London.

[25] While they continued to live part of the year in England, they subsequently spent more time in Biarritz in France where they had previously vacationed.