The phrase 'they usually return' is correct and usable in written English.
You can use it when you are referring to people or things that have a habit or tendency to return to a certain place. Example sentence: Every summer, the birds migrate south for the winter, but they usually return in the spring.
At dusk, they usually return home.
After three years of therapy, they usually return to mainstream school.The for-profit providers argue that they are much more efficient than their charitable counterparts.
Others, like the many species of burrowing petrels, may take longer as they usually return to the places they were born.
When UK indie bands decamp to Texas, they usually return with secondhand Nudie suits and thirdhand songs about communing with the ghost of Gram Parsons.
And if found guilty and ordered incarcerated, they usually return to court, their youthful forays into criminal activity likely to turn them into recurrent adult criminals.
They usually return to the centres in the evening to sleep.
After HCR patients received medical attention, their symptoms tended to resolve rapidly, and they usually returned home within a day or two.
(The Coppolas have always kept the house there as their home base, where they also have a vineyard. Between Francis's movies, they would usually return there).
Albatrosses are highly philopatric, meaning they will usually return to their natal colony to breed.
Sometimes lymph nodes swell in reaction to an allergy, but if that's the case they'll usually return to normal within a few days.
The Department of Health and Human Services Office of Refugee Resettlement (ORR) is legally required to take custody of children who have entered the United States (unless they are Mexican, in which case they are usually returned quickly to Mexico).
