This is the 996th most frequent Italian word.
centinaia
"Centinaia" means "hundreds" in English.
Here, 'centinaia' is used to indicate an approximate quantity, suggesting a very large number of people.
Ci sono centinaia di persone al concerto.
There are hundreds of people at the concert.
In this case, 'centinaia' expresses an overwhelming and large amount, emphasizing the abundance of emails received.
Ho ricevuto centinaia di email oggi.
I received hundreds of emails today.
Here, 'centinaia' depicts the magnitude and considerable count of rare manuscripts stored in the ancient library.