'at usual' is a correct phrase that can be used in written English.
It is used when referring to performing an action in the same manner or frequency as one typically does. For example, "I will be leaving for work at usual time."
Contrary to previous belief, at usual levels of consumption, coffee is not any more of a diuretic than the equivalent amount of water.
Peyton Manning was solid at usual, throwing for 352 yards and driving Indianapolis (2-2) thetyingying touchdown with 48 seconds left.
And unlike in England, employers are not making special arrangements for fans to watch the game and it will be business at usual at St Andrew's House, headquarters of the devolved Scottish government.
I'm kinda over the meatfest that has proliferated in the restaurant scene, added to which, it's the usual "meet you there at 6pm to avoid the queue" shenanigans, which is impossible if you a) are hungry at usual times, b) have teenagers, and/or c) have a job across town.
The presence of anions at usual buffer concentrations diminish in particular the stacking/dispersive interactions.
The method was free from interferences of inorganic salts and trace metals at usual concentrations in seawater.
Gait speed at usual pace has been shown to moderate this association in a population of noninstitutionalized people aged 65 years or older.
One hundred sixty-four healthy primigravid women who were considered at usual risk for preeclampsia underwent the same tests as a parallel study.
This work provides an overall behaviour report of automobile radiators working at usual range of operating conditions, while significant knowledge-based design conclusions have also been reported.
In order to clarify the physical meaning of such irregularities, we will compare fatigue properties at usual frequencies and ultrasonic frequency.
The crystallization rate of this fraction is very slow and it does not crystallize in the calorimeter when cooled from the melt at usual rates.
