During

предлог в течение, в продолжение, во время

Большой англо-русский словарь

During

preposition Etymology: Middle English, from present participle of duren to last, from Anglo-French durer, from Latin durare to harden, endure, last, from durus hard; perhaps akin to Sanskrit dāru wood — more at tree 1. throughout the duration of Example: swims every day during the summer 2. at a point in the course of Example: was offered a job during a visit to the capital

Merriam-Webster's Collegiate Dictionary