Drill-down queries display "expansions" or longer phrases /phrase-frames incorporating your query terms. The results indicate the number and percentage of occurrences of each phrase represented by specific longer phrases. Your suggestions for this feature are most welcome.
Databases for n-grams and POS-grams rebuilt to include some tokens omitted from the original database. Many thanks to Michael Stubbs for pointing out the discrepancies between actual n-gram counts and those in the PIE database! During the transition period 26 August - 17 September, frequencies reported for phrase-frames were potentially somewhat lower than the sum of the n-gram variants.