by force of habit
US /baɪ fɔrs əv ˈhæbɪt/
UK /baɪ fɔrs əv ˈhæbɪt/

1.
습관적으로, 습관의 힘으로
because of a routine or custom, without conscious thought
:
•
He still checks his old email account every morning by force of habit.
그는 매일 아침 습관적으로 옛 이메일 계정을 확인한다.
•
She automatically reached for her phone by force of habit, even though she knew it was dead.
그녀는 전화가 꺼진 것을 알면서도 습관적으로 전화기를 잡았다.