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A lot vs. Alot: 9 Grammatical Pitfalls

all of

1.
The entire amount of something, as in The baby ate all of his cereal. This usage is relatively new, the word of being included only from about 1800 on.
2.
No less than, at least, as in Although she looked much younger, she was all of seventy. [ First half of 1800s ]
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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