That is perhaps less frequently than you work on a Friday, Thanksgiving week being a likely exception. In addition, there's a clear recent trend, particularly for the Senate: fewer and fewer times over recent years has the body been in session.
Which is true, to an extent. The conservative Washington Examiner looked at how often members of the Senate returned to their home states, finding that longer-term incumbents were less likely to do so. Two of the longest serving senators, Sens. Patrick Leahy (D-Vt.) and Orrin Hatch (R-Utah), returned to their districts 17 and 15 times a year on average, according to the Examiner's data.
Regardless, it seems clear that McConnell thinks the Senate should be in Washington and on Capitol Hill with more regularity than they have recently. The history of Friday working seems to go through these ups and downs. A trend back up probably won't incur many complaints from voters.