Painting Wood Trim White

I wanted all the trim in the house to be white.  It was a light oak.  Here is the hallway with just the primmer.  From here it needs two coats of white semi-gloss paint.  I added just one coat and you could see though a little.  The last coat gave it really what it needed.  No, I have added more painters tape, and will need to add two more coats to what already is there.