metroace":1htbbdze said:“ So, how difficult is it to score by a corner kick? These results suggest that it is quite difficult although this depends, in part, on how a goal from a corner kick is defined. The range is anywhere from 1 goal for every 36 to 70 corners attempted. Or, slightly less than 2% of corner kicks result in a goal.”
Source: http://www.scienceofsocceronline.com/2010/12/corner-kicks-by-numbers.htm
Harry Kane scored twice from corners and so did Harry Maguire at the 2018 World Cup, against international opposition that had got through the qualifying stages.
I doubt England had over 100 corners in that tournament, not even half that!