It would 0% 
You have to make the chart to figure this out. 
You put BB on the top and bb on the side than multiply.
        
                    
             
        
        
        
The time required for a typical atom in the oceanic plate to complete the plate tectonic cycle is about in excess of two hundred fifty million years in which this is required for it to developed and to be fully complete for it to fully finish the plate tectonic cycle.