whats the number of times the letter a appears in:
the exhibition at protected content will focus on hopper’s iconic representations of the infinite expanse of american landscapes and cityscapes. to date, this aspect has rarely been highlighted in exhibitions devoted to edward hopper, yet it is key to understanding his work and its reception. with watercolors and oil paintings dating from the protected content to the protected content , the exhibition will provide an extensive and exciting overview of the multifaceted nature of edward hopper’s oeuvre.

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I found twenty-five "a"s in the provided passage.
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