If the least frequent "slot" in your search (the "slot" whose combined frequency is the least in the corpus) has a frequency of 40,000,000 or more, then we use pre-calculated "n-grams" tables rather than searching the corpus itself. These n-grams tables contain the top 10,000,000 strings in the corpus for each of the two word strings (2-grams), 3-grams, 4-grams, and 5-grams. But because it's just the top 10,000,000 n-grams, it may not contain a full listing of matching strings.

You can re-do the search by clicking on the "SEE FULL LIST" link in the results set. This may be much slower, and may actually "time out" (if so, *please* don't re-do the search again -- after two searches like this you will be blocked for 20 minutes). If it works, though, it will show the complete set of results.