The following histogram represents the number of pages in each book within a collection. What is the frequency of books containing at least 250 but fewer than 400 pages? 
Definitions:
Subconscious
The part of the mind that is not fully aware but influences actions and feelings.
The Interpretation of Dreams
A book by Sigmund Freud that introduces his theory of the unconscious with respect to dream interpretation and discusses what dreams are and how they are a pathway to understanding inner thoughts.
Victor of Aveyron
A feral child discovered in late 18th century France who became a subject of study in the development of language and education for children with severe disabilities.
Socialization
The process through which individuals learn and adapt to the norms, values, and behaviors of their society.
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