The scenes in the manga world in which Zhao Youyue appeared were rather jumpy. For example, "Xu Jing" might be having dinner with her mother moments ago, but for the next moment she might be sitting in the classroom silently studying. Days may have passed in between the manga scenes, but the actual time in real life is still linear.
For Zhao Youyue, the jumping of the scenes did not greatly affect her. After all, her learning content is pretty much continuous. The mangaka only bothered to draw her studying and would never go into details with what she actually learned. These are all decided by Zhao Youyue herself.
She could even be memorizing vocabularies while performing house chores. Would she stoop low to compensated dating some day, perhaps she could even bring along her reference books and complete the practice questions while making love…