This is the 1704th most frequent Spanish word.
tantas
"So many" or "as many."
Here, 'tantas' is used as an adjective that indicates a large quantity of movies, modifying the plural noun 'películas'.
He visto tantas películas este mes.
I have watched so many movies this month.
In this sentence, 'tantas' emphasizes the frequency, modifying the plural noun 'veces'.
Tantas veces me has ayudado, te debo mucho.
So many times you have helped me, I owe you a lot.
'Tantas' in this example quantifies the plural noun 'errores', indicating a significant number or amount.