How did the letter Z come to be associated with sleeping snoring? First of all, zzzz (or z-z-z-z) is sound of snoring, from at least 1918 (Sometimes "a tiny saw cutting through a log" [1948] would be used, and both the snore and saw would make the same z-z-z-z sound ) Over time, this became associated with sleep in general, but most comic reference books (e g 2006's KA-BOOM!
Zzzz - 知乎 Where’s the fun in forever? 回答数 152，获得 10,384 次赞同
Is “zzzzz” the most common spelling to represent a person sleeping? For what it's worth, I don't know that the number of z's really means anything – a string of z's connotes sleeping, and nothing makes 4 z's any more "correct" than 5 or 3 I'd bet that simple aesthetics often plays a role in how many z's a writer chooses to use, though it may be interesting to know that my Mac spell checker accepts zzz and zzzz, but puts a red squiggle underneath zz and