No, Sony does release quarterly games. Its in form of timed exclusive games. That is how peop;le trust their content. They have some of the biggest timed exclusive on their platform.
This year alome, they have FF16 as timed exclusive with Spiderman 2. Xbox doesnt have that type of timed exclusive.
They need to be bold and do timed exclusive games like x360. After tomb raider, they chickened out and stopped doing it.