I like it as a nickname for [name_f]Winifred[/name_f], [name_f]Wilfreda[/name_f], [name_f]Federica[/name_f], [name_f]Freida[/name_f], Fredricka, Alfriede
They’re all good though I lean toward [name_u]Freddie[/name_u] more than [name_u]Freddy[/name_u] for reasons unknown.
I love [name_u]Freddy[/name_u] on a girl!! 
I’m not one for nicknamey names, so I would use a longer legal name. [name_f]Freeda[/name_f] has gorgeous goddess and magical vibes (reminds me of Freya)! [name_f]Frederica[/name_f] has similar goddess / warrior vibes for me.
[name_u]Love[/name_u] Freddy/Freddie for a girl😍. I just peeked and it means “elf power”. [name_m]Even[/name_m] cuter!