a chunk of time

Translations
значительный отрезок времени
She dedicated a chunk of time to learning a new language.
Она посвятила значительный отрезок времени изучению нового языка.
Definitions
A chunk of time refers to a specific, often substantial, period or segment of time that is set aside for a particular activity or purpose.
Words
a

article or possessive pronoun
один
chunk

noun
отрезок
of

preposition
из
time

noun
времени