day in day out
US /deɪ ɪn deɪ aʊt/
UK /deɪ ɪn deɪ aʊt/

1.
hari demi hari, secara berterusan
continuously or repeatedly over a long period of time
:
•
He does the same boring job day in day out.
Dia melakukan kerja membosankan yang sama hari demi hari.
•
The factory produces thousands of units day in day out.
Kilang itu menghasilkan ribuan unit hari demi hari.