Corpus, for sure, is the other tool that can help us in language learning.
Teacher Sally had made a very concise conclusion about corpus:
The Application of Concordancers (Corpus) in Language Learning
1. To learn how the word is used in context.
2. To clarify the meaning of words.Whether there is any difference between words that are commonly taken as synonymous.
3. To deal with grammar rules and conflicting evidences.
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We can learn the authentic language from the natural context.
It's even more realible than asking a single foreigner, since there are hundreds thousnads of datas in Corpus.
After looking up in dictionaries and using the concordance tools,
my conclusion about big and large are:
1. Big and Large are used when talking about physical, size, extent, capacity or number.
2. Big is more informal.
3. Large is not normally used to describe people.
e.g. They live in a big/ large house in the country.
e.g. Her husband is a very big man.
4. Big and large are not generally used with uncountable nouns – but note the fixed expressions big business, big trouble.