relFreq.defaultReturnValue(0);
for (int i = 0; i < min(k, results.size()); i++) {
Document document = collection
.document(results.get(i).document);
Reader reader = (Reader) document.content(fieldIndex);
WordReader wordReader = document.wordReader(fieldIndex);
wordReader.setReader(reader);
MutableString word = new MutableString();
MutableString nonWord = new MutableString();