This is the 311th most frequent Hungarian word.
dolgozott
"Worked" (past tense of "work").
Here, "dolgozott" represents a singular third person past tense of "dolgozni" (to work), indicating that the subject performed work in a specific location.
Tegnap az irodában dolgozott.
Yesterday, he/she worked in the office.
In this context, "dolgozott" points to a habitual or frequent action in the past by the subject.
Régen sokat dolgozott az építkezésen.
In the past, he/she worked a lot on the construction site.
Here, "dolgozott" is used to imply a specific instance of work related to the referenced project.