How is “many's the” used?

In 12 Years a Slave (2013), one line is: “Now, "many" signifies a great many.”

Which movie is “many's the” from?

The clip at the top of this page is from 12 Years a Slave (2013).

Modismo

used to show that sth happens often

formal · Se oye en 948 películas

many's the…
used to show that sth happens often
Many's the time I heard her use those words.

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

Now, "many" signifies a great many.

En 8 películas · n.º 1