No New Episodes Until March 6???

I’m sorry if this has been asked previously but I’m new to this sub.  I’m watching Grey’s Anatomy for the first time and I just started S16.  I see there are 8 episodes for S21 but no new episodes scheduled until March 6.  Is that normal for there to be such a huge time span between episodes of a season?  I can understand a hiatus between seasons but this season isn’t over yet.  Or is it?