Although of English nationality, Frempah was born in Sassuolo, Italy.
The 22-year-old was previously on the books at Leicester City, having made the move jumping seven league levels from Bostik League South side Cray Wanderers.
More recently he was with Scottish Premier league Ross County where he stayed for the entire 2014/15 season, making eight appearances.
Since leaving Ross, Frempah has had a spell with Bostik Premier outfit Hendon but has suffered from injuries in recent months.
Frempah could make his debut in tomorrow's home game against Boreham Wood.