長久以來

长久以来
chángjiǔyǐlái
for a long time now; long since

CEDICT

Examples

長久以來我都很早就寢。

For a long time, I've had a habit of going to bed early.

Source: Tatoeba

Entry Composition

1 長久 chángjiǔ
  1. long-time; long-term
  2. lasting; enduring; permanent
  3. for a long time
2 以來 yǐlái since (a previous event)