More like "frequency of bugs" developers put out for their games. Best to buy only once the "GOTY/Definitive/Special edition" is released and all DLC's are available and when it's a couple of years and 50 patches old - including patches fixing the patches. And when the game is on holiday discount sale. The game is then smooth and playable with no blood-pressure inducing defects and doesn't need too much Googling/forum-posting on asking what went wrong.