Tomas Barlow wrote:

Possibly taking vacation?  She's active on Twitter.  She usually doesn't do every game - more like 6 or 7 out of 10.

Exactly, my take too.  The team plays 162 games,  however the broadcasters get time off...vacation, individual days, etc.;  like any other occupation.  Over the course of a season in any year,  you will find that different members of the the SN team are not on-air for one or more games.