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Use "subcategories" in a sentence
"To do this I’ve created two large categories, let’s say a “Blog” category & a “Reviews” category, then put everything else in subcategories of Blog or Reviews."
"According to the legislation, schools and districts are to assess their performance data based on how certain "subcategories" of students score."
"WLT, as he liked to call it on the basis of the authors 'last initials, demonstrated his librarian's training through its incorporation of such subcategories as Spurious Works by JL, Motion Pictures, Anthologies in English, Reviews of Books in Foreign Languages, and more."