User blog comment:Edwin Shade/Understanding The Infinite/@comment-32213734-20171109230028/@comment-1605058-20171110083934

Interestingly, all sources I find (1 2 3 4, the first four hits for "naught vs nought") claim the exact opposite, that "naught" is used to mean "nothing", whereas "nought" is used to mean "zero", at least in British English. They don't quite agree with their use in American English (one claims they are mostly interchangable, one that "naught" is the name for zero, one doesn't mention BrE/AmE distinction and the last one states "naught" is sort of default spelling in all cases).