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Edward William Dolch's list of 220 Most Commonly Used Words by reading level.
data(sw_dolch)
A character vector with 220 elements
Dolch's Word List made up 50-75% of all printed text in 1936.
Word. The word
Level. The reading level of the word
Dolch, E. W. (1936). A basic sight vocabulary. Elementary School Journal, 36, 456-460.