"quit studying" is a correct and usable phrase in written English.
It is generally used to express the idea of stopping or discontinuing something, for example: "I'm going to quit studying and take a break."
I quit studying psychology at Roehampton University in February because university just seemed too casual.
I was studying but when he died I had to quit studying.
Then she quit studying piano, grew up, got married, had children, and became a journalist.
There were the children who quit studying to help pay for their father's imported exotic herbs sourced from the wild.
"They say empty mind is a devil's workshop, so if girls quit studying at the age of 15, how will they keep themselves engaged?" asked Balwan Singh.
Soon Andrew had quit studying altogether and begun eating and drinking maniacally, sometimes stuffing food into his mouth until he gagged.
That is, boys that would have done much better in vocational studies were forced to follow a more academic track; they lost motivation and quit studies at 16 years old.
Ms. Valentine insists she's going to stay in the business for only two years, then quit to study makeup.
After spending time in the sales department of one of his family's businesses, he quit to study at the École du Louvre.
This article describes the protocol of the REDUQ (REDUce and Quit) study, which examines whether smoking reduction counselling plus combination nicotine replacement therapy (NRT) is (cost- effective in acost- effectiveerm abstinence in smoking COPD pachievingot ready to quit.
Those with uncontrolled hypertension (diastolic blood pressure over 100 mmHg), a history of cardiac arrhythmia, cardio-respiratory disorders, and orthopedic problems were excluded from the study (n=15) and six quit the study along the way.
