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

1.
per forza d'abitudine, per abitudine
because of a routine or custom, without conscious thought
:
•
He still checks his old email account every morning by force of habit.
Controlla ancora la sua vecchia email ogni mattina per forza d'abitudine.
•
She automatically reached for her phone by force of habit, even though she knew it was dead.
Ha automaticamente allungato la mano verso il telefono per forza d'abitudine, anche se sapeva che era scarico.