From The Center for American Progress:

This was a Congress that the conservative R Street Institute described as “more dysfunctional than ever”—only 52 pieces of legislation were passed in the Senate by a recorded vote.30

[30] James Wallner, “Mitch McConnell said the 115th Congress was ‘the best,’ but it’s more dysfunctional than ever,” R Street Institute, February 4, 2019, available at https://www.legbranch.org/mitch-mcconnell-said-the-115th-congress-was-the-best-but-its-more-dysfunctional-than-ever/. The use of a recorded vote is often an indicator of legislation with some significance; whereas minor, noncontroversial legislation is more typically passed by unanimous consent.