they had, besides the 5 goalless games, FOUR others where they only scored one goal (Watford, Burnley, Norwich, and Chels, so 3 shit teams)
if they had failed to score in just one of those
they would be rolling at a 50% goalless games clip
compare that to truly great runs in leagues by top teams, where they go 25, 30, 40 league games or more without failing to score
all comps look at the number of games