This is the 218th most frequent Hebrew word.
עשרות
"Tens" (groups of ten).
In this context, "עשרות" indicates a quantifier referring to a specific and notable count of books, implying a considerable collection.
מצאנו עשרות ספרי היסטוריה ישנים בבית הספר.
We found dozens of old history books at the school.
Here, "עשרות" serves to highlight the significant number of instructions, emphasizing the volume rather than exact details.
המייל החדש כלל עשרות הנחיות חדשות.
The new email included dozens of new instructions.
The word "עשרות" is used here to describe an approximate quantity, suggesting a large number of reasons without specifying the exact count.