This is the 215th most frequent Hungarian word.
időszakban
"Időszakban" means "in the period" or "during the period" in English.
Here, 'időszakban' refers to a specific time duration within which the speaker experienced significant learning.
Ebben az időszakban sokat tanultam az új munkámban.
During this period, I learned a lot about my new job.
In this example, 'időszakban' specifies a seasonal time frame characterized by particular natural beauty.
A tavaszi időszakban mindig szépek a kertek.
In the spring season, the gardens are always beautiful.
This usage of 'időszakban' identifies a time period associated with holiday traditions and practices.