expression, godan verb (-u)
frequent tirelessly; visit persistently
Describes going to a place repeatedly and diligently, often with a sense of effort or persistence. The 詰めて part implies doing something intensively or without pause.
彼は就職活動中、毎日のように会社に詰めて通った。
During his job hunt, he visited the company tirelessly almost every day.
I love that café and go there persistently several times a week.