It’s like we always say, to take 12,841 wickets, you need to create 15,516 chances. (We should stick that on a T-shirt).
At the time of writing, the second Test between England and the West Indies had seen 12 drops, which is rather more than you’d expect.
The Windies were responsible for seven of those in the first innings alone. Based on the average run value of a ‘chance’ in Test cricket, they could quite reasonably have expected that to cost them 200 runs.
England made 258, which just goes to demonstrate the home team’s impressive commitment to providing chances during that innings.