<div dir="ltr"><div>Hello,</div><div><br></div><div>I'm working on research with learner corpora. My corpora aren't that big (approx. 250,000 wds with about 300-400 text files). I wonder what research/textbook sources anyone can point me to that discuss the importance of considering how many texts in the corpus a language feature occurs in (as opposed to merely considering overall frequency of a language feature within a corpus). </div>
<div><br></div><div>Many Thanks!</div><div>Brian </div></div>