I've 1 a year for the past 5 years after a 20 year layoff,
on 12/15/05 I shot 300/768 in league on 12/18/05 in the local area Masters Tournament qualifying I shot a 290 in the sixth game of qualifying, in this case our pair had to wait approximately 5 minutes to move right 2 pairs due to slow bowling of the foursome in front of us.
For me after a wait such as this, I lose my comfort zone of timing and muscle memory that I may have had and its takes a frame or two to get dialed in again.