얼마 전부터

for some time now

→ 얼마
phrase Rare #27,223
for some time now Indicates that something began a while ago and has continued since then.
KO: 얼마 전부터 한국어를 배우고 있어요.
EN: I've been learning Korean for some time now.

얼마 전부터 이상해요

It’s been strange for a while now.

— 아메리카의 밤 (1973)

당신 얼마 전부터 이상해요

You've been acting strange lately.

— 아메리카의 밤 (1973)