Long time ago, there was a search page that provided a few release related fields like name, and duration formatted as mm:ss.
I really miss this. The only way I can figure out to do this using an Indexed Search is to convert mm:ss to milliseconds, which is a pain as well as overly precise, and then to structure a query "name-of-song duration:nnnnnnnn".
Would be a lot easier if there was a quick search page with "fill in the blanks" for a few commonly used fields like release, album, artist, duration, date-range, comment, number-of-tracks.
And BTW, it looks like support for times is weak, as the Indexed Search Syntax help page explicitly notes that you can't search for albums by track length...