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Through force of habit Maureen asked how the flight was.

Almost by force of habit we made our way to the seat and sat down.

In little things he was still honest, from force of habit if for no other reason.

I go on living, more from force of habit than anything else.

The captain almost said yes from force of habit, but she caught herself.

Through force of habit, I did not tell my husband.

He looked at his watch, more from force of habit than a need to know the time.

But either force of habit or his private nature kept him where he was.

By force of habit they turned away from each other.

Maybe it's force of habit: They've owned everything else in the series.