This is the 633rd most frequent German word.
menge
The German word "Menge" means "quantity" or "amount" in English.
In this sentence, 'Menge' is used to refer to a large, unspecified quantity of something (books).
Ich habe eine Menge Bücher gelesen.
I have read a lot of books.
Here, 'Menge' denotes a large group or gathering of individuals (people).
Die Menge der Menschen auf dem Konzert war überwältigend.
The crowd of people at the concert was overwhelming.
In this context, 'Menge' is used metaphorically to indicate the effort or amount of studying, emphasizing quality and effort.