"habitual expressions" is a grammatically correct and usable phrase in written English.
You can use it to refer to expressions or phrases that are used frequently, often repeated over time. For example, "Saying 'Have a nice day!' to customers is a habitual expression of the shopkeeper's."
Ms. Duffy looked triumphant: her face shone; gone was the faint grimace that had once been her habitual expression.
Maybe they just think 'it's that man again' and ignore the victim's habitual expression of pained disbelief.
Bevilacqua has "saffron-colored fingers" from smoking, and wore "the habitual expression of a slaughtered ram".
(Starkey, who is sixty-two and wears horn-rimmed glasses and a habitual expression of incredulity, is also famously impolitic: his outbursts on the BBC program "The Moral Maze" have earned him the title in the tabloids of the "rudest man in Britain").
A short, gnarled, nervous man, with the habitual expression of a disgruntled troll, Roberts putters around amid his chaotic stock in a grass-green artist's smock and, in defiance of a sign on his wall that reads "ONL Y LOW CONVERSATION PERMITTED" rarely drops his voice below the level of a drill sergeant's.
From the perspective of its nature, an action consists in its verbal and/or habitual expression.
Accordingly, the aim of this study is to identify the habitual expression modes used by individuals when conveying their desires for product forms.
"For the moment I'm searching for words," the coach said, wearing his habitual puzzled expression.
After a shout of glee, Heidegger immediately caught himself and resumed his habitual fierce expression.
He usually dresses conventionally, and his habitual public expression is one of mild bemusement, but his features work against this look: his eyes are a rimy blue, his nose is grandiose and fiercely convex, his chin juts sharply forward, and there is a big gap between his two front teeth.
